NAVITWIN IV.pdf

Operation, Installation and Service Manual

Off Hdg.10˚

Set Hdg.246.0

DISPLAY DATA

MONITOR

ALARM

NO ACTIVE

ALARM

Hdg. Diff10˚

Gyro 1Gyro 2

GYRO

1

GYRO

2

GYRO

3

MAGN

COMP

246.8

246.7

246.8

247.0

12.8 kn

AUTO

SPEED

NAVITWIN IV

Heading Management System

056344/A, 16 Mar 2006

Northrop Grumman Sperry Marine B.V. (Representative Office)Woltmanstr. 19 • D-20097 • Hamburg, Germany

Tel.: +49-40-299 00-0 • Fax: +49-40-299 00-146 • E-mail: [email protected]

056344/A NAVITWIN IV

© 2006 Northrop Grumman Sperry Marine B.V.This document and the information herein is the intellectual property of Northrop Grumman Sperry Marine B.V. [NGSM BV] and it’s associate companies and may not be copied or repro-duced without the express permission of NGSM BV.Specifications were correct at time of press but may be varied in accordance with NGSM BV’s policy of continuous product development.Any technical content should be verified with NGSM BV.

Sperry Marine, with worldwide headquarters in Charlottesville, VA, and major engineering and support offices in Melville, NY, New Malden, England, and Hamburg, Germany, is part of the Northrop Grumman Electronic Systems sector.

Revision Record

Rev. Date Remarks

A 16 Mar 2006 initial release

NAVITWIN IV 056344/A

Safety Instructions

Safety Notice Conventions

The following safety notice conventions are followed throughout this manual:

DANGER A Danger notice contains an operating or main-tenance procedure, practice, condition, state-ment, etc., which, if not strictly observed, will

result in injury or death of personnel.

WARNING A Warning notice contains an operating or maintenance procedure, practice, condition, statement, etc., which, if not strictly observed, could result in injury or death of personnel.

CAUTION A Caution notice contains an operating or main-tenance procedure, practice, condition, state-ment, etc., which, if not strictly observed, could

result in damage to, or destruction of equip-

ment.

Note A Note contains an essential operating or main-tenance procedure, condition or statement, which is considered important enough to be highlighted.

Special safety symbols may be used in this manual to indicate:

Risk of electrical shock.

Used in conjunction with a Danger or Warning notice.

Electrical components are sensitive to electro-static discharge.Used in conjunctin with a Caution notice.

i


General Safety Information for the Operator

General Safety Information for Service Personnel

WARNING NAVITWIN IV permits to activate a heading source as soon as heading

data is received from the respective device.

Make sure that a gyrocompass has settled before using its heading as

the reference for heading control systems, RADAR, ECDIS, etc.

A magnetic heading source should be made active only in case of failure

of the gyrocompass(es).

CAUTION When the NAVITWIN IV is used in a system containing the fiber-optic gyrocompass NAVIGAT 2100:At each new alignment (restart) of the NAVIGAT 2100, make sure that the compass aligns correctly, using valid speed and position data.It is required to confirm the correct input data at the NAVIGAT 2100 con-trol and display unit when a new alignment is carried out.

WARNING Hazardous voltage is present inside the NAVITWIN IV.

Danger of electrical shock or burn when the CCFL inverter connections

are touched.

Disconnect power before opening the device.

When servicing the device without the back cover installed, do not touch

the PCB while power is applied to the board.

CAUTION The NAVITWIN IV contains electrostatic sensitive components.

Electrostatic discharge may permanently damage components.

When servicing the NAVITWIN IV, take precautions to prevent electro-static discharge. Avoid touching any of the electronic circuitry.

ii


Contents

Chapter 1: Introduction

1.1 Design and Main Features........................................................................ 1-1

1.2 Example System Configurations ............................................................. 1-2

Standard NAVIGAT Dual Gyrocompass/TMC System ........................... 1-2Triple Gyrocompass/TMC System ........................................................... 1-3Independent Off Heading / Heading Diff. Alarm Device......................... 1-4

1.3 Technical Data............................................................................................ 1-5

Chapter 2: Operation

2.1 Display and Operating Keys ..................................................................... 2-1

Display ....................................................................................................... 2-1Operating Keys .......................................................................................... 2-1

2.2 External control devices ........................................................................... 2-2

2.3 Power-up Sequence .................................................................................. 2-2

2.4 Selecting the active heading source ....................................................... 2-3

2.5 Selecting additional display data ............................................................ 2-4

2.6 Adjusting the display brightness............................................................. 2-4

2.7 Optional Functions.................................................................................... 2-5

Muting Alarms Remotely.......................................................................... 2-5Resetting/Acknowledging a Central Watch Alarm .................................. 2-5Reversing the Heading Display (180° offset)........................................... 2-5External Dimming ..................................................................................... 2-5

2.8 Operating Menu ........................................................................................ 2-6

Entering and Quitting the Menu Mode.................................................... 2-6Navigating the Menu ................................................................................ 2-7Selecting Parameter Settings ................................................................... 2-8Editing Parameter Values ......................................................................... 2-8

2.9 Off Heading Monitor Settings.................................................................. 2-9

2.10 Heading Diff. Monitor Settings .............................................................. 2-10

2.11 Manual Settings Menu ........................................................................... 2-11

Manual Settings – Overview ...................................................................2-11Manual Settings – Parameters ............................................................... 2-13

Speed ........................................................................................... 2-13Mag Variation .............................................................................. 2-15Rate of Turn ................................................................................. 2-16North Sp. Err. Corr....................................................................... 2-16

2.12 User Setup ............................................................................................... 2-17

User Setup – Overview ........................................................................... 2-17User Setup – Parameters ........................................................................ 2-18

Date & Time................................................................................. 2-18Magn. Cal. Tab............................................................................. 2-18Version Info ................................................................................. 2-19

iii


Chapter 3: Alarm System

3.1 Alarm Indication ........................................................................................3-1

Audible Alarm Indication ..........................................................................3-1Single Beep: Invalid Action ..........................................................3-1Continuous Beeping: Pending Alarm ..........................................3-1

Visual Alarm Indication.............................................................................3-1

3.2 Acknowledging Alarms/Muting the Audible Alarm...............................3-2

Local Alarm Acknowledge ........................................................................3-2External Alarm Mute .................................................................................3-2

3.3 Viewing the active alarms ........................................................................3-3

3.4 Alarm messages ........................................................................................3-4

Internal Alarms ..........................................................................................3-4External Alarms (from NAVIGAT compasses).........................................3-6

Chapter 4: Scheduled Maintenance

4.1 Maintenance by Shipboard Personnel ....................................................4-1

Chapter 5: Installation

5.1 Mechanical Installation.............................................................................5-1

Console Mounting..................................................................................... 5-1Console Frame Version .............................................................................5-1Housing with Bracket ................................................................................5-1Connector Cable ........................................................................................5-1

5.2 Electrical Installation.................................................................................5-2

Wiring Up the System...............................................................................5-2

5.3 Initial System Configuration ....................................................................5-2

5.4 Magnetic Heading Calibration .................................................................5-3

Calibration Procedure ...............................................................................5-3Determining magnetic heading correction values .....................5-4Storing the magnetic heading calibration table .........................5-5Deleting entries from the magnetic heading calibration table..5-6

Chapter 6: System Configuration

6.1 Service Setup Menu..................................................................................6-1

Setup Access Code....................................................................................6-1Service-Setup – Overview.........................................................................6-2Service Setup – Parameters......................................................................6-6

Gyro 1.............................................................................................6-6Gyro 2.............................................................................................6-7Gyro 3/Magn..................................................................................6-8Set Hdg./GPS ............................................................................... 6-10RS422 Outp. 1.............................................................................. 6-11RS422 Outp. 2.............................................................................. 6-12Port Settings ................................................................................ 6-14Internals ....................................................................................... 6-16

iv


Chapter 7: Troubleshooting

7.1 General Troubleshooting Instructions..................................................... 7-1

7.2 Location of Parts on the NAVITWIN IV PCB ........................................... 7-2

Exchangeable Components...................................................................... 7-3Connectors................................................................................................. 7-3Diagnostic LEDs......................................................................................... 7-4

Chapter 8: Corrective Maintenance

8.1 Exchanging the System Software ........................................................... 8-1

Downloading Software from the Flashboard.......................................... 8-1Exchanging the Flashboard.......................................................... 8-2

Uploading Software via the Service Interface ........................................ 8-3

8.2 Replacing the RS-422 Output Driver IC ................................................... 8-3

Appendix A: Setup and Configuration Tables

Appendix B: Drawings

v


vi


Chapter 1: Introduction

1.1 Design and Main Features

The Heading Management System NAVITWIN IV performs a number of control and monitoring functions within a multicompass system:

• It displays the actual heading from the available heading sources and lets the operator select the active source for distribution to other equipment, e.g. heading control systems, RADAR, compass repeat-ers etc.NAVITWIN IV can display up to three true heading and one magnetic compass heading source.

• It monitors the difference between any two of the available heading sources.Should the difference exceed a user-defined threshold, a "Heading Difference Alarm" is given.

• It monitors the difference between the active source’s heading and the commanded set heading in automatic steering modes.Should the difference exceed a user-defined threshold, an "Off Head-ing Alarm" is given.The set heading may be received automatically from a heading con-trol system or entered manually.

• It reads the analogue signals from a Sperry Marine fluxgate sensor, type 4863, and converts these into magnetic heading data in NMEA format, including automatic correction for magnetic variation and sensor calibration values.

• It serves as the central operating and control unit for dual and triple gyrocompass systems with the NAVIGAT X MK 1, MK 2 and NAVI-GAT 2100 compasses.System-wide operational settings and setup parameters are entered at the NAVITWIN IV and transmitted to the connected compasses.

Design and Main Features 1-1


1.2 Example System Configurations

The following simplified configuration examples illustrate some typical applications of the NAVITWIN IV.

Standard NAVIGAT Dual Gyrocompass/TMC System

The system shown in Figure 1-1 below is the standard configuration for a dual gyrocompass system with Sperry Marine gyrocompasses type NAVIGAT X MK 1 or NAVIGAT 2100.

By selecting the active heading source at the NAVITWIN IV , the opera-tor determines which compasses’ data is distributed via the Switch-Over Unit to external equipment, such as heading control systems, RADAR, compass repeaters etc.

The heading diff. alarm function permits to monitor the difference between any two of the available heading sources.The off heading alarm function permits to monitor the difference between the actual heading from the active source and the set heading order received from a heading control system.

Alarms generated locally by a NAVIGAT gyrocompass are indicated and may be acknowledged at the NAVITWIN IV.In turn, the NAVITWIN IV transmits system-wide operational settings and setup parameters to the NAVIGAT gyrocompasses.In a NAVIGAT dual gyrocompass system, the available heading sources and the hdg. diff threshold are also indicated at both gyrocompasses.

If a magnetic heading source is installed, NAVITWIN IV applies magnetic variation and distributes the data to external equipment (TMC function). In case of failure of the gyrocompasses, the magnetic heading source may be activated to provide an emergency heading reference for repeat-ers and other peripheral equipment.

Figure 1-1:

NAVIGAT DualGyrocompass System

MagneticCompass

Gyrocompass NAVIGAT X MK 1

or NAVIGAT 2100

Gyrocompass NAVIGAT X MK 1

or NAVIGAT 2100

GYRO

1

GYRO

2

MAGN

COMP

246.8

246.7

247.0

G1 Hdg.

G2 Hdg.

M Hdg.Source Sel. Status

Alarm Status (Hdg. Diff, Off Hdg)

G/ M Headings, RoT, and all other data/signals distributed via Switch-Over Unit

Switch-Over Unit

NAVITWIN IV

Steering Mode StatusSet Heading

from vessel's steering/ heading control system:

M Hdg.

1-2 Example System Configurations


Triple Gyrocompass/TMC System

In a triple gyrocompass system, the NAVITWIN IV displays the heading data from three true heading sources and the magnetic heading from a fluxgate sensor, type 4863 (if installed).

By selecting the active heading source at the NAVITWIN IV, the operator determines which compasses’ data is distributed to external equipment, such as heading control systems, RADAR, compass repeaters etc.In a triple gyrocompass system, the NAVITWIN IV controls two cascaded Switch-Over Units to distribute the data as required.

The heading diff. alarm function permits to monitor the difference between any two of the available heading sources.The off heading alarm function permits to monitor the difference between the actual heading from the active source and the set heading order received from a heading control system.

Alarms generated locally by a NAVIGAT compass within a triple gyro-compass system are indicated and may be acknowledged at the NAVITWIN IV.In turn, the NAVITWIN IV transmits system-wide operational settings and setup parameters to NAVIGAT gyrocompasses.In contrast to the standard dual NAVIGAT system, the gyrocompasses in a triple system are configured as stand-alone devices. Only the own heading is displayed locally at the respective gyrocompass.

If a fluxgate sensor, type 4863, is installed, NAVITWIN IV applies mag-netic variation and distributes magnetic heading data to external equip-ment (TMC function). In case of failure of the gyrocompasses, the magnetic heading source may be activated to provide an emergency heading reference for repeaters and other peripheral equipment.

Figure 1-2:

Triple Gyrocompass/TMC system

MagneticCompass

GYRO 3

GYRO 2

GYRO 1

GYRO

1

MAGN

COMP

246.8

247.0

GYRO

2 246.7

G3 Hdg.

G2 Hdg.

G1 Hdg.

M Hdg.


G/ M Headings, RoT, and all other data/signals distributed via Switch-Over Units

Switch-Over Units

NAVITWIN IV



GYRO

3 246.9

Source Sel. Status

M Hdg.

Example System Configurations 1-3


Independent Off Heading / Heading Diff. Alarm Device

Another typical application for the NAVITWIN IV is to retrofit an existing gyrocompass system with an independent off heading and/or a heading difference alarm device.

In these cases, the NAVITWIN IV is used as a monitoring device only. The device is not used to select the active heading source or to distrib-ute data to external equipment.

Figure 1-3 below shows a simple system where the NAVITWIN IV is used to monitor the difference between a gyro and a magnetic compass and also to monitor the difference between the actual heading from the reference selected and the set heading order as received from a heading control system or entered manually.

Figure 1-3:

Independentoff hdg./hdg. diff.

alarm system

GYRO

1

MAGN

COMP

246.8

247.0

G1 Hdg.


NAVITWIN IV



MagneticCompass

GYRO 1

M Hdg.

1-4 Example System Configurations


1.3 Technical Data

Environmental Requirements

ambient temperature, operation –15 to +55 °C

ambient temperature, storage –25 to +70 °C

protection grade PN 74813 (for console mounting):IP 56 to DIN 40050, if installed with seal in console panel/framePN 74819 (in housing with bracket): IP 23 to DIN 40050

environmental conditions / EMC in accordance with IEC 60945

Magnetic Clearance

to standard magnetic compass 0.70 m

to steering magnetic compass 0.40 m

reduced, to standard magnetic compass 0.45 m

reduced, to steering magnetic compass 0.30 m

Power Supply

supply voltage 24 VDC (18-36 V)

max. ripple content ±4 Vpp; extreme values may not exceed 36 V or fall below 18 V

power consumption 12 W

Dimensions and Weight

PN 74813 (for console mounting)

width 288 mm

height 96 mm

depth 44 mm; approx. 100 mm backward clearance from mounting surface required for connector cable and plug

weight 1 kg approx.

PN 79361 (PN 74813 factory-assembled in console frame)

frame width 319 mm

frame height 127 mm

PN 74819 (in housing with bracket)

width 350 mm

max. height (unit in vertical position)

150 mm

max. depth (unit in horizontal position)

130 mm

weight 2.15 kg approx.

Technical Data 1-5


Data Inputs

true heading (3x) NMEA 0183or PLATH protocol

magnetic heading, serial*

* If serial magn. hdg. input is used, max. 2 true hdg. inputs are available.

NMEA 0183or PLATH protocol

autopilot set heading / GPS speed/pos. NMEA 0183or NAVIPILOT†

† If NAVIPILOT format ist used, input receives set heading only.

Signal and Status Inputs

magnetic heading, fluxgate sensor sin., cos. and ref. voltages from Sperry Marine flux-gate sensor type 4863

steering mode status (auto/man) connection to P.Gnd via ext. contact,latching

ext. alarm acknowledge status (mute) connection to P.Gnd via ext. contact,momentary, n.o.

ext. dim+ or G1/G2 ctrl. status connection to P.Gnd via ext. contact,dim+: momentary, n.o.,G1/G2 ctrl.: latching

ext. dim-, offset 180° or G/M|G/G3 ctrl. status

connection to P.Gnd via ext. contact,dim-: momentary, n.o.,offset 180°: latching,G/M|G/G3 ctrl.: latching

1-6 Technical Data


Data Outputs

serial data RS-422 output 1 if available, all of:gyrocompass headingmagnetic compass headingrate of turnheading reference statuscomp. mon. op. data

serial data RS-422 output 2 if available, all or selectable sub-set of:gyrocompass headingmagnetic compass headingrate of turnheading reference statuscomp. mon. op. data

serial data TTL output if available, all of:gyrocompass headingmagnetic compass headingrate of turnheading reference statuscomp. mon. op. data

Alarm and Status Outputs

power failure/general alarmheading difference alarmoff heading alarmwatch alarm acknowledge

potential-free relay contacts,each rated30 VDC/1.0 A,100 VDC/0.3 A,125 VAC/0.5 A;

G1/G2G/G3G/M

outputs to Switch-Over-Unit;open collector, drawn to Gnd potential in “on” status

Technical Data 1-7


1-8 Technical Data


Chapter 2: Operation

2.1 Display and Operating Keys

Figure 2-1:

NAVITWIN IVoperating unit

Display

Operating Keys

➀ Heading Source Window: Shows the available heading sources and their actual values. The currently active heading source is indi-cated by a thick border and arrow symbols next the source’s name.

➁ Display Data Window: Shows additional data, such as rate of turn, speed/position and the alarm list.

➂ Monitor Window: Shows the heading diff. and off heading monitor-ing settings and status

➃ Alarm Window: Shows the current alarm status.

➄ Heading Source Selector Keys: Select the currently active heading source.

➅ Navigation Keypad: Arrow keys navigate through display data and menu screens; ENTER key confirms and stores selections made in menu screens.

➆ ACK key: Acknowledges pending alarms.

➇ MENU key: Calls up the operating menu from the normal opera-tional mode.

➈ DIM- / DIM+ keys: Adjust the display brightness.

Off Hdg.10˚

Set Hdg.246.0

DISPLAY DATA

MONITOR

ALARM

NO ACTIVE

ALARM

Hdg. Diff10˚

Gyro 1Gyro 2

GYRO

1

GYRO

2

GYRO

3

MAGN

COMP

246.8

246.7

246.8

247.0

12.8 kn

AUTO

SPEED

5 1 2 3 6

4 7 8 9

Display and Operating Keys 2-1


2.2 External control devices

Depending on the installation, external devices may be present which remotely control certain functions of the NAVITWIN IV:

• An external selector switch may be used to reverse the heading (apply a 180° offset to the heading data) e.g. for operation in double-ended ferries.

• The audible alarm at the NAVITWIN IV the may be muted from a remote device, e.g. a central alarm panel.

• External pushbuttons may be used to adjust the display brightness.

2.3 Power-up Sequence

The NAVITWIN IV is not equipped with a power switch. The device pow-ers up as soon as supply power is applied to the gyrocompass system.

Upon power up, the startup routine is executed:

A startup screen is shown and a system test sequence is executed.

A status line at the bottom of the screen indicates the progress and results of the following tests:RAM testI/O testChecksum testSetup Data test

When the system test has been passed, the NAVITWIN IV enters normal operational mode. The heading source window displays the heading data from the available compasses.

The currently active heading source is indicated by a bold frame and by arrow symbols next to the source’s name.

Off Hdg.10˚

Set Hdg.246.0

DISPLAY DATA

MONITOR

ALARM

NO ACTIVE

ALARM

Hdg. Diff10˚

Gyro 1Gyro 2

GYRO

1

GYRO

2

GYRO

3

MAGN

COMP

246.8

246.7

246.8

247.0

12.8 kn

AUTO

SPEED

Note Upon power-up, the NAVITWIN IV will activate the heading source which was selected when the device was last powered down.If no valid heading is available from this source, an alarm is given and the operator must activate a different source.

CAUTION When the NAVITWIN IV is used in a system containing the fiber-optic gyrocompass NAVIGAT 2100:At each new alignment (restart) of the NAVIGAT 2100, make sure that the compass aligns correctly, using valid speed and position data.It is required to confirm the correct input data at the NAVIGAT 2100 con-trol and display unit when a new alignment is carried out.

2-2 External control devices


2.4 Selecting the active heading source

The operator may select one of the available heading sources as the “active” source, i.e. the heading reference to be distributed to compass repeaters, heading control system, RADAR, ECDIS etc.).

The currently active heading source is indicated by a bold frame around its display and a pair of arrow symbols next to the source name.

To change the active heading source:

Press the selector key next to the desired source’s heading display.

The selected source is made active.

GYRO

1

GYRO

2

246.8

246.7

GYRO

1

GYRO

2

246.8

246.7

Note The active heading source can be changed in a manual steering mode only.In automatic steering modes, source selection is disabled and an error beep will be given when a source selector key is pressed.

WARNING NAVITWIN IV permits to activate a heading source as soon as heading

data is received from the respective device.

Make sure that a gyrocompass has settled before using its heading as

the reference for heading control systems, RADAR, ECDIS, etc.

A magnetic heading source should be made active only in case of failure

of the gyrocompass(es).

Selecting the active heading source 2-3


2.5 Selecting additional display data

The data display window shows a selection of additional data received via the heading source inputs or the GPS/Auto input.

Depending on the available data, the operator may select one of up to five groups of data to be displayed in the display data window.

2.6 Adjusting the display brightness

Press the Up/Down arrow keys to scroll through the display data options.

If all relevant data is available, the follow-ing data groups are selectable:

• Position mode, latitude and longitude.

• Speed mode and actual value

• Mag. Variation mode and actual value

• Rate of Turn and North Speed Error Correction values (if received from gyrocompass type NAVIGAT)

• Date and Time (DD.MM.YY, hh.mm)

The selected data group is displayed until another group is selected.

Upon power-up, the NAVITWIN IV will dis-play the data group which was selected when the device was last powered down, providing the relevant data is available.

DISPLAY DATA

44˚09.46' N

023˚54.21' E

AUTO

POSITION

12.8 kn

AUTO

SPEED

1.2˚ E

MAN

MAG VARIATION

TIME

31.12.06

DATE

12:34

+32.1 ˚/min

RATE OF TURN

Speed Corr.

-1.4˚

The brightness of the display and keypad illumination is adjusted via the DIM+/DIM- keys:

Press the DIM+ key to increase the illumination brightness.Press the DIM- key to reduce the illumination brightness.

Off Hdg.10˚

Set Hdg.246.0

MONITOR

ALARM

NO ACTIVE

ALARM

Hdg. Diff10˚

Gyro 1Gyro 2

GYRO

2

GYRO

3

MAGN

COMP

246.7

246.8

247.0

Note The display brightness can only be adjusted in normal operational mode.The brightness setting is not retained between power-ups. NAVITWIN IV always powers up at maximum brightness.

2-4 Selecting additional display data


2.7 Optional Functions

The following functions may be available if the system is equipped with the respective external controls and configured accordingly.

Muting Alarms Remotely

On alarm, actuate the mute control at a remote device (e.g. a central alarm panel). The audible alarm is muted.

Resetting/Acknowledging a Central Watch Alarm

If connected to a central watch alarm facility ('dead man alarm'), the NAVITWIN IV will automatically reset the watch alarm timer whenever a key is pressed on the unit.

Should a watch alarm be given, pressing any key at the NAVITWIN IV will acknowledge the alarm and reset the watch alarm timer.

Reversing the Heading Display (180° offset)

To reverse the heading display, e.g. for operation on double-ended fer-ries, activate the 180° offset function at the associated external control.

External Dimming

If external DIM+/DIM- pushbuttons are installed, these operate in parallel with the builtin DIM+/DIM- keys. If an external DIM+ button is installed only, it will increase the illumination level stepwise and, will revert to the lowest level when pushed past the maximum level.

Note A remotely muted alarm remains in the pending (unacknowledged) state. The alarm is indicated as pending in the alarm window until the alarm is acknowledged at the NAVITWIN IV or the cause of the alarm is elimi-nated.

Optional Functions 2-5


2.8 Operating Menu

The monitoring settings as well as the manual settings, user and service setup sub-menus are accessed through a multilevel operating menu.

Entering and Quitting the Menu Mode

From the normal operational mode, press MENU to enter the menu mode.

In the right hand side of the display, the Main Menu window opens, which now overlays the data display, moni-tor and alarm status windows.

The keys of the navigation keypad may now be used to navigate the menu, to select parameter settings and to edit parameter values.

From the main menu screen, press MENU to return to the normal opera-tional mode.

The menu window is closed and the data display, monitor and alarm status windows become visible again.

Off Hdg.10˚

Set Hdg.246.0

DISPLAY DATA

MONITOR

ALARM

NO ACTIVE

ALARM

Hdg. Diff10˚

Gyro 1Gyro 2

12.8 kn

AUTO

SPEED

OFF HDG ALRMHDG DIFF ALRMMAN. SETTINGSUSER SETUPSERVICE SETUP<< EXIT

MAIN MENU

OFF HDG ALARMHDG DIFF ALARMMAN SETTINGUSER SETUPSERV SETUP<< EXIT

MAIN MENU

Off Hdg.10˚

Set Hdg.246.0

DISPLAY DATA

MONITOR

ALARM

NO ACTIVE

ALARM

Hdg. Diff10˚

Gyro 1Gyro 2

12.8 kn

AUTO

SPEED

Note When the menu mode is active and no key is pressed for more than 30 seconds, the NAVITWIN IV automatically returns to normal operational mode.In the menu mode, the source selector keys are disabled and the bright-ness level cannot be adjusted.Should an alarm be given while the menu mode is active, the audible alarm is sounded, but the operator must return to the normal operational mode to view the alarm message and acknowledge the alarm.

2-6 Operating Menu


Navigating the Menu

In the menu mode, the operator may navigate through the menu using the Right, Left, Up and Down arrow keys.

The arrow symbol ( ) at the left of the window indicates the cursor position on the current menu level.

With the Up/Down arrow keys, move to the cursor to the required sub-menu position.

Arrow symbols ( ) to the right of the window indicate that a sub-menu exists for the respective option.

Press the Right arrow key to enter a sub-menu.

Press the Left arrow key to return to the next higher menu level.

XXXXXXXX

AAAAAAAABBBBBBBBCCCCCCCC

CCCCCCCCBBBBBBBBAAAAAAAA

CCCCCCCCBBBBBBBBAAAAAAAA

MAIN MENU

XXXXXXXX

XXXXXXXX

YYYYYYYY

YYYYYYYYXXXXXXXX

ZZZZZZZZ

XXXXXXXX

MAIN MENU

XXXXXXXX

YYYYYYYYXXXXXXXX

< BACK

< BACK

Note Alternative key functions may be used to navigate the menu:- selecting a sub-menu option and pressing ENTER enters the sub-menu- pressing MENU in a sub-menu returns to the next higher menu level- selecting the “<BACK” option in a sub-menu and pressing ENTER

returns to the next higher menu level- selecting the “<<EXIT” option at the top menu level and pressing ENTER

quits the menu mode and returns to normal operational mode

Operating Menu 2-7


Selecting Parameter Settings

In a number of sub-menus, the operator is expected to select parameter settings from a list of available options.

The available options and the current selection are indicated by different symbols:

Radio buttons: Allow to select exactly one of the available options.

: selected

: deselected

Checkboxes: Allow to select or activate none, one or more of the available options.

: selected

: deselected

Editing Parameter Values

In a number of sub-menus, parameters are set by editing a numerical value or an alphanumerical string.

To select parameter settings in a sub-menu:

With the Up/Down arrow keys, move to the required option.

Press ENTER to confirm and store the selection.

MENU leaves the option sub-menu without changes.

To edit a parameter value in the respective sub-menu:

With the Up/Down arrow keys, edit the character at the current cursor position.

With the Right/Left arrow keys, move the cursor forward/back to edit the next/previous character.

Press ENTER to confirm and store the new value.

MENU leaves the option sub-menu without changes.

OPTION BOPTION A

OPTION C

OPTIONS

OPTION BOPTION A

OPTION C

OPTIONS

OPTION BOPTION A

OPTION C

00000

10000

10000

VALUE

VALUE:

VALUE

2-8 Operating Menu


2.9 Off Heading Monitor Settings

NAVITWIN IV can monitor the difference between the actual heading from the active source and the set heading order in automatic steering modes. The set heading may either be received automatically from a heading or track control system or may be entered manually.

Should the difference between the actual and set headings exceed the alarm threshold, the “Off Heading Alarm” is given.

To set the parameters for off heading monitoring:

MAIN MENU

OFF HDG ALRM

AUTO

MODE

OFF

MAN

XXXXXXXX

THRESHOLD

Call up the Main Menu

Go to OFF HDG ALRM settings

To select the off hdg. alarm mode:

Go to MODE selection

Select required mode; OFF = alarm off AUTO = set hdg. auto receive MAN = set hdg. manual setting

To set the off hdg. alarm threshold:

Go to THRESHOLD setting

Edit threshold value; range: 0 – 99˚

XXXXXXXX

MAN. SET HDG

To set the manual set hdg. value:

Go to MAN SET HDG setting

Edit manual value; range: 0.0 – 359.9˚

Note When the set heading order is changed (a turn is ordered), monitoring becomes active only after the difference between the actual and set head-ings has once fallen below the alarm threshold.

Off Heading Monitor Settings 2-9


2.10 Heading Diff. Monitor Settings

NAVITWIN IV can monitor the difference between any two of the availa-ble heading sources. Should this difference exceed the alarm threshold, the “Heading Diff. Alarm” is given.

To set the parameters for heading diff. monitoring:

MAIN MENU

HDG DIFF ALRM

GY1/GY2

SOURCE

OFF

GY1/GY3

XXXXXXXX

THRESHOLD

GY1/MAGNGY2/GY3GY2/MAGNGY3/MAGN


Go to HDG DIFF ALRM settings

To select the monitored sources:

Go to SOURCE selection

Select sources; OFF = diff alarm off GY1/GY2 = true hdg. 1 vs. 2 GY1/GY3 = true hdg. 1 vs. 3 GY1/MAGN = true hdg. 1 vs. magn. GY2/GY3 = true hdg. 2 vs. 1 GY2/MAGN = true hdg. 2 vs. magn. GY3/MAGN = true hdg. 3 vs. magn.

To set the alarm threshold:

Go to THRESHOLD setting

Edit threshold value; range: 0 – 99˚

2-10 Heading Diff. Monitor Settings


2.11 Manual Settings Menu

The Manual Settings menu provides access to settings which the opera-tor may need to alter more or less frequently during normal operation.

Manual Settings – Overview

Figure 2-2:

Manual Settings

Note Some of the manual settings have no direct effect at the NAVITWIN IV but will overwrite the corresponding values at connected gyrocompasses of types NAVIGAT X MK 1, MK 2, or NAVIGAT 2100.

SPEED

MODE

AUTO

MANUAL VALUE

value: -99.9 – 99.9 kn

AUTO2

MAN

contd. on next page

speed input settings

POSITION

MODE

AUTO

MANUAL LON

lon. value: 180˚00.00' W – 180˚00.00' E

AUTO2

MANUAL LAT

lat. value: 90˚00.00' S – 90˚00.00' N

MAN

position input settings

MAG VARIATION mag. variation input settings

MANUAL VALUE

value: 99.9˚ W – 99.9˚ E

MANUAL SETTINGS

SPEEDPOSITIONMAG VARIATION

AUTO

Manual Settings Menu 2-11


Figure 2-3:

Manual Settings(cont.d)

contd. from previous page

NAVIPRINT

not implemented in current software release

nav. data printer settings

RATE OF TURN

TIME CONSTANT

damping time constant: 0.0 – 10.0 s

MAX ROT ALARM

'max. ROT' alarm threshold: 0 – 6000 ˚/min

rate of turn settings

MANUAL SETTINGS

NORTH SP. ERR. CORR north speed error correction

NAVIPRINTRATE OF TURN

< BACK< BACKNORTH SP. ERR. C.

2-12 Manual Settings Menu


Manual Settings – Parameters

Speed

Sets the speed input parameters.This setting is effective for the NAVITWIN IV internally and for all con-nected compasses evaluating the NAVITWIN IV op. data.

Mode

Selects the speed input mode.

Settings: AUTO

Speed data is read automatically from the serial data inputNAVIGAT 2100 compasses will use the Auto1 input

AUTO2

Speed data is read automatically from the serial data inputNAVIGAT 2100 compasses will use the Auto2 input

MAN

The actual speed value is entered manually

Manual Value

Sets the input value for manual speed data.

Value: -99.9 – 99.9 kn



Position

Sets the position input parameters.This setting is effective for the NAVITWIN IV internally and for all con-nected compasses evaluating the NAVITWIN IV op. data.

Mode

Selects the position input mode.

Settings: AUTO

Position data is read automatically from the serial data inputNAVIGAT 2100 compasses will use the Auto1 input

AUTO2

Position data is read automatically from the serial data inputNAVIGAT 2100 compasses will use the Auto2 input

MAN

The actual position value is entered manually

Manual Lat.

Sets the manual input value for the latitude.

Value: 90°00.00’ N – 90°00.00’ S

Manual Lon.

Sets the manual input value for the longitude.

Value: 180°00.00’ W – 180°00.00’ E



Mag Variation

Sets the magnetic variation input parameters.This setting is effective for the NAVITWIN IV internally and for all con-nected compasses evaluating the NAVITWIN IV op. data.

AUTO

Selects the magnetic variation input mode.

Settings: ON (option checked)Mag. variation data is read automatically from the serial data input

OFF (option unchecked)The actual mag. variation value is entered manually

Manual Value

Sets the manual input value for mag. variation.

Value: 99.9° W – 99.9° E

NAVIPRINT

Sets the operating parameters for the NAVIPRINT nav. data printer.Thise settings are only effective for connected compasses evaluating the NAVITWIN IV op. data

Settings

At the time of writing of this manual, the NAVIPRINT settings are not yet implemented in the NAVITWIN IV system software.The printer must be set up locally via the manual settings menu at the respective compass(es). The local printer settings will not be overwritten by the NAVITWIN IV, as the printer settings are omitted in the op. data messages sent to the compasses.



Rate of Turn

Sets the rate of turn input parameters.This setting is only effective for connected compasses evaluating the NAVITWIN IV op. data.

Time Constant

Sets the damping time constant for rate of turn data.In NAVIGAT 2100 compasses, the “low” time constant is set.

Value: 0.0 – 10.0 s

Max. ROT Alarm

Sets the alarm threshold for the “Rate of Turn exceeded” alarm.

Value: 0.0 – 6000 °/min.

North Sp. Err. Corr.

Selects the North speed error correction mode for the connected gyro-compasses.This setting is effective only for conventional gyrocompasses of type NAVIGAT X MK 1 or NAVIGAT X MK 2.

Settings: ON (option checked)Automatic North speed error correction is enabled.

OFF (option unchecked)Automatic North speed error correction is disabled.



2.12 User Setup

The User Setup menu provides access to settings which the operator may need to alter only occasionally.

User Setup – Overview

Figure 2-4:

User SetupDATE & TIME

DATE

man. value: DD.MM.YY

date and time settings

MAGN CAL TAB

USE CAL TAB

ENTER VALUES

enter, modify or delete cal. table entries

magnetic hdg. calibration table

VERSION INFO

view software version info (read-only)

software version info

TIME

man. value: hh:mm

USER SETUP

DATE & TIMEMAGN CAL TABVERSION INFO< BACK< BACK

AUTO

User Setup 2-17


User Setup – Parameters

Date & Time

Sets the date and time input parameters.

AUTO

Selects the date and time input mode.

Settings: ON (option checked)Date/time are read automatically from the serial data input

OFF (option unchecked)The current date and time are entered manually

Man. Date

Sets the current date manually.

Value: DD.MM.YY (current date in format day.month.year)

Man. Time

Sets the current time manually.

Value: hh:mm (current time in format hours:minutes)

Note If manual input is used, date and time must be set after each power-up.

Magn. Cal. Tab

Sets the parameters for the magnetic compass calibration table.

Use Cal Tab

Switches the automatic magnetic heading correction on or off.

Settings: ON (option checked)Automatic correction is enabled

OFF (option unchecked)Automatic correction is disabled

Enter Values

Enters the correction values into the magn. calibration table.

Values: max. 36 pairs of heading and correction values

2-18 User Setup


Version Info

Displays the system software version info screen.

Settings: none

The software version sub-menu is read-only.

User Setup 2-19


2-20 User Setup


Chapter 3: Alarm System

3.1 Alarm Indication

Audible Alarm Indication

Single Beep: Invalid Action

Continuous Beeping: Pending Alarm

Visual Alarm Indication

A single short beep indicates that the operator attempted to carry out an invalid action.This is the case, e.g. if the operator tries to change the heading reference in an automatic steering mode or to activate a head-ing source from which no valid data is received.

Continuous on-off beeping indicates that a pending (unac-knowldedged) alarm is present.Simultaneously, a corresponding alarm message is shown in the alarm window.

Green: no active alarms

If no alarms are active, the alarm window title bar and message area have a green background and the message “no active alarms” is shown.

Red: active alarm(s)

If one or more alarms are active, the alarm window title bar changes to red. A messages is shown which specifies the alarm at hand.Active alarms have one of two possible states:

Pending (unacknowledged):The cause of the alarm is present and the opera-tor has not yet acknowledged the alarm.The message background flashes red-white.

Acknowledged:The operator has acknowledged the alarm but the cause of the alarm is still present.The message background is white.

ALARM

NO ACTIVE

ALARM

ALARM (1/1)

TIMEOUT

GYRO 1

ALARM (1/1)

TIMEOUT

GYRO 1

Note Pending alarms from NAVIGAT gyrocompasses (“external alarms”) are indicated and may be acknowledged at the NAVITWIN IV.However, the NAVITWIN IV displays no acknowledged external alarms.

Alarm Indication 3-1


3.2 Acknowledging Alarms/Muting the Audible Alarm

Local Alarm Acknowledge

External Alarm Mute

To acknowledge a pending alarm at the NAVITWIN IV:

Press ACK.

The audible alarm indication is muted.

In case of an internal alarm, the alarm is now indicated as being acknowledged.

In case of an external alarm, the alarm is cleared at the NAVITWIN IV.

ALARM (1/1)

TIMEOUT

GYRO 1

ALARM (1/1)

TIMEOUT

GYRO 1

Note When an alarm has been acknowledged, the ext. alarm status output remains active until the cause of the alarm is eliminated.When the cause of an alarm is eliminated, the alarm is acknowledged automatically and the alarm status is cleared.The NAVITWIN IV does not keep a history of past (inactive) alarms.

To mute the audible alarm externally (e.g. from a central alarm panel):

Actuate the external mute facility.

The audible alarm indication is muted.

The visible alarm indication is not cleared and the alarm remains in the pending state until it is locally acknowledged at the NAVITWIN IV.

ALARM (1/1)

TIMEOUT

GYRO 1

ext. alarm mute

ALARM (1/1)

TIMEOUT

GYRO 1

3-2 Acknowledging Alarms/Muting the Audible


3.3 Viewing the active alarms

If more than one active alarm is present, the total number of alarms and the index number of the currently displayed alarm are shown in the alarm window title bar.

To view all active alarms, scroll through the list of alarm messages with the Left or Right arrow key:

ALARM (2/3)

TIMEOUT

SPEED

ALARM (1/3)

TIMEOUT

GYRO 1

ALARM (3/3)

TIMEOUT

POSITION

Note As long as any pending (unacknowledged) alarms are present, these will automatically be redisplayed when other messages have been viewed, until all alarms have been acknowledged by the operator.

Viewing the active alarms 3-3


3.4 Alarm messages

Internal Alarms

Internal alarms are all alarm condition which the NAVITWIN IV senses by itself. Next to the “Off heading” and “Heading difference” monitoring alarms, these are the loss of data on the serial input lines and faulty return voltages from the fluxgate sensor.If the system is configured to read back the selection status from the Switch-Over Unit, an alarm is also given when the heading source selec-tion at the NAVITWIN IV differs from the status of the Switch-Over Unit.

Table 3-1:

Internal alarmmessages

message text cause corrective action

OFF HDGALARM

The difference between the actual heading and the set heading has exceeded the alarm threshold.

Determine the cause for the off heading con-dition.If heading control sys-tem is not capable of keeping set heading, change over to manual steering mode.If actual heading data appears incorrect, change over to manual steering mode and acti-vate a reliable heading source.

HDG DIFF. FAIL ALARM

The difference between the monitored heading sources has exceeded the alarm threshold.

Check the monitored heading sources for data integrity.If active source delivers incorrect data, change activate another source.If any monitored source delivers incor-rect data,select another pair of monitored sources or disable monitoring until problem is fixed.

TIMEOUTGYRO1

No valid data received from true heading source.(dashes shown in heading display of respective source)

If source is active, acti-vate another source immediately.Check function of the respective heading source and interface.

TIMEOUTGYRO2

TIMEOUTGYRO3

3-4 Alarm messages


TIMEOUTMAGN

No valid data received from magnetic head-ing source (serial inter-face)

If source is active, acti-vate another source immediately.Check function of mag-netic heading source and interface.

INTERFACE FAIL MAGN

Interface failure mag-netic heading source (sin/cos fluxgate sen-sor)

If source is active, acti-vate another source immediately.Check function of flux-gate sensor and inter-face.

TIMEOUTPOSITION

No valid position data received from active source (NAVIGAT gyro-compass) or GPS

Check whether active source or GPS provides valid position data, check interface.

TIMEOUTSPEED

No valid speed data received from active source (NAVIGAT gyro-compass) or GPS

Check whether active source or GPS provides valid speed data, check interface.

TIMEOUTROT

No rate of turn data received from active source (NAVIGAT gyro-compass)

Check whether active source provides valid rate of turn data.

TIMEOUT SPEED_ERR_CORR

No North speed error correction data received from active source (NAVIGAT gyro-compass)

Check whether active source properly com-putes error correction

TIMEOUTMAGN_VAR

No valid magn. varia-tion data received from active source (NAVI-GAT gyrocompass) or GPS

Check whether active source or GPS provides valid magn. variation data, check interface.

TIMEOUTDATE

No valid date received from active source (NAVIGAT gyrocom-pass) or GPS

Check whether active source or GPS provides valid date/time, check interface.

TIMEOUTTIME

No valid time received from active source (NAVIGAT gyrocom-pass) or GPS

Check whether active source or GPS provides valid date/time, check interface.

TIMEOUTSET_HDG

No valid set heading data received from heading control system

Check whether heading control system pro-vides valid set heading, check interface.

INTERFACE FAIL. SWITCH OVER

Source selection sta-tus from Switch-Over Unit differs from active selection at NAVITWIN IV

Check status lines to/from Switch-Over Unit, check whether unit reacts properly to source selection.


Alarm messages 3-5


External Alarms (from NAVIGAT compasses)

External alarms are the alarms transmitted by a NAVIGAT X MK 1, MK 2, or NAVIGAT 2100 gyrocompass. These alarms are displayed and may be acknowledged at the NAVITWIN IV. Once acknowledged, however, external alarms are cleared at the NAVITWIN IV.To determine whether an acknowledged external alarm is still active, the error list at the respective compass must be checked.

Table 3-2:

External alarmmessages

CAUTION When acknowledging an external alarm from a NAVIGAT 2100, make sure that the compass fully recovers from the error.Upon alarm acknowledge, the NAVIGAT 2100 executes the command which corresponds to confirming the alarm message, i.e. pressing the F1 key, at the compass.In certain cases, it may be necessary to take further action to return the NAVIGAT 2100 to normal operation, e.g. it might be required to change the speed or position data source or to execute a new align (restart) of the system.


GYRO 1 FAIL Compass failure orcompass receives no data from external gyrocompass source.

If alarm given without an an internal gyro fail-ure occurring simulta-neously, check the interfaces/connections between the NAVIGAT gyrocompasses.

GYRO 2 FAIL

GYRO 3 FAIL

MAGN FAIL No data received from magnetic heading source.

If alarm given without an an internal gyro fail-ure occurring simulta-neously, check the interface/connection between the NAVIGAT gyrocompass and the magnetic heading source (normally the NAVITWIN IV).

SPEED FAIL No data received from serial speed input.(NAVIGAT 2100: serial speed input 1)

Check interface/con-nection between the NAVIGAT gyrocom-pass and the speed data source.

SPEED 2 FAIL NAVIGAT 2100:No data received from serial speed input 2

Check interface/con-nection between the NAVIGAT gyrocom-pass and the speed data source.

POSITION FAIL No data received from serial position input.(NAVIGAT 2100: serial position input 1)

Check interface/con-nection between the NAVIGAT gyrocom-pass and the position data source.

3-6 Alarm messages


POS. 2 FAIL NAVIGAT 2100:No data received from serial position input 2

Check interface/con-nection between the NAVIGAT gyrocom-pass and the position data source.

HDG DIFF. FAIL Hdg. Diff. alarm thresh-old exceeded.

If alarm given without internal hdg. diff. alarm occurring simultane-ously, check the system configuration and the connection between the gyrocompass and the NAVITWIN IV.

MAX ROT EXC. Max. Rate of Turn alarm threshold exceeded.

“Max. ROT Exc.” alarm reminds the operator not to exceed preset threshold during turns. Prevent vessel from turning too fast or increase threshold if unwanted alarms are given.

GYRO CUR. ALARM NAVIGAT X MK 1 / 2:Excessive gyrosphere current.

check compass for proper function. If alarm persists, call Sperry Marine for serv-ice.

DC SUPPLY FAIL NAVIGAT X MK 1 / 2:Backup DC power sup-ply failure.

Check power supply to compass

AC SUPPLY FAIL NAVIGAT X MK 1:AC (main) power sup-ply failure.NAVIGAT X MK 2:Main DC power supply failure.

Check power supply to compass

ERROR 19 NAVIGAT 2100:Correction values out of range.

Alarm is given when-NAVIGAT 2100 roll/pitch correction values are changed by more than ±3°.Acknowlegde the alarm or cancel the change of correction values at the NAVIGAT 2100 directly.

ERROR 20 NAVIGAT X MK 1 / 2:Recommended gyro-sphere maintenance interval exceeded.

Acknowledge the alarm.Recommended gyro-sphere maintenance should be carried out in due time.


Alarm messages 3-7


ERROR 21 NAVIGAT 2100:Communication fault between fiber-optic sensor and interface unit.

Acknowledge the alarm.Check proper function of the compass and take any further meas-ures required to return the NAVIGAT 2100 to normal operation.

ERROR 22 NAVIGAT 2100:Position plausibility error.


ERROR 23 NAVIGAT 2100:Error status message received from fiber-optic sensor.


NTIV COM. FAULT Compass receives no valid data from the NAVITWIN IV.Common parameters in Manual Settings / User Setup menues will not be transmitted to the compass.

Check the connection between NAVITWIN IV and the gyrocompass.


3-8 Alarm messages


Chapter 4: Scheduled Maintenance

4.1 Maintenance by Shipboard Personnel

The NAVITWIN IV is a solid-state electronic device and contains no con-sumable parts. Therefore, no set maintenance schedule is required.

The front plate should be kept clean and a regular visual inspection of cables and connectors should be carried out to detect any signs of dam-age or deterioration.

CAUTION The front plate is made of clear polycarbonate.Do not clean the front plate with organic solvents, acetone or any other substance which could damage or discolor plastic.Use only water and soap or a mild detergent to clean the front plate.

Maintenance by Shipboard Personnel 4-1


4-2 Maintenance by Shipboard Personnel


Chapter 5: Installation

5.1 Mechanical Installation

Console Mounting

To mount the NAVITWIN IV directly in a console panel (without console frame) a panel cutout is required as shown in dimensional drawing 4994-0112-02 (see Appendix B). Suitable fasteners for console mounting are provided in the installation kit 22596.

A backward clearance of approx. 100 mm from the mounting surface is required to protect the connector cable from being bent too strongly at the plug.

Console Frame Version

When ordered factory-assembled in a console frame, the NAVITWIN IV is already fastened to the frame. The required cutout for a standard 3x1 frame is shown in dimensional drawing 0031-0112-02 (see Appendix B).

If a custom frame is delivered, installation-specific dimensional draw-ings for the frame and cutout will be provided with the equipment.

A backward clearance of approx. 100 mm from the frame top surface is required to protect the connector cable from being bent too strongly at the plug.

Housing with Bracket

The NAVITWIN IV housing with bracket is shown in dimensional draw-ing 4994-0112-02 (see Appendix B). The mounting bracket carries four holes of 5.3 mm dia. for fixing the bracket to any plane surface, such as a console panel, wall or ceiling. The required fasteners are to be provided by the shipyard or installer.

Connector Cable

The NAVITWIN IV connector cable terminates into a 50-wire pigtail for connection to a terminal block (see Appendix B).

If the optional connection box is not used, the required terminal block is to be provided by the shipyard or installer. The installer must make sure that the end of the cable sheath is firmly secured to the vessel structure with tie-wraps or other suitable means, so that the individual wires are free from tension at the terminals. Unused wires, if not connected to ter-minals, must be isolated and fastened to the end of the cable sheath.

Mechanical Installation 5-1


5.2 Electrical Installation

Wiring Up the System

Wire up the system according to the connection diagrams and other rel-evant documents provided.

If installation-specific connection diagrams have been provided for a given system, these supersede any connection information contained in standard connection diagrams.

If wiring up according to standard connection diagrams, make sure beforehand that all data and signals to receive from or transmit to exter-nal equipment are compatible with the NAVITWIN IV I/O specifications, according to interface specification 004994-0120-001.

5.3 Initial System Configuration

When the system has been wired up, all configuration parameters are to be set to the required values in the Service Setup in order to make the NAVITWIN IV fully functional. For a description of the Service Setup, refer to Chapter 6.

The operating parameters in the User Setup and Manual Settings men-ues should also be set as required for normal operation within the given system.

If a magnetic heading source is connected to the NAVITWIN IV, the mag-netic compass calibration procedure should be carried out during a sea trial, as described in the following section.

CAUTION When wiring up the system, make sure that the power supply for the NAVITWIN IV is switched off and is safeguarded against accidental switching-on.

5-2 Electrical Installation


5.4 Magnetic Heading Calibration

Ideally, the magnetic heading displayed at the NAVITWIN IV would exactly match the indication of the steering magnetic compass (at a mag. variation of 0.0°).In practice, however, deviations will occur between the steering mag-netic compass heading and the heading data transmitted by a fluxgate sensor or an electronic compass, as displayed at the NAVITWIN IV.

The NAVITWIN IV automatically corrects such deviations if a calibration table has been stored and calibration is activated in the User Setup.

Calibration Procedure

The magnetic heading calibration is a two-part procedure.

First, the existing deviations between the indication of the steering mag-netic compass and the magnetic heading displayed at the NAVITWIN IV are determined. This requires that the vessel is swung very slowly through a full circle so that for each full 10° of magnetic compass head-ing (0, 10, ..., 350°) the corresponding display value is obtained.

After calculating the resultant correction values, these are entered in the magnetic heading calibration table at the NAVITWIN IV.

The calibration table stores up to 36 entries (’cal. no.s’), each of which assigns a correction value to a given magnetic heading (0, 10, ..., 350°).

Note The magnetic heading calibration serves to match, as closely as possible, the indication at the steering magnetic compass and the magnetic head-ing displayed at the NAVITWIN IV, at a mag. variation of 0.0°.It is strongly disapproved to use a true heading source, e.g. a gyrocom-pass, as the calibration reference.Also, it should not be attempted to correct residual deviations of a prop-erly adjusted magnetic compass by means of the calibration table.

CAUTION The magnetic heading calibration corrects deviations due to the com-bined effects of the magnetic environment, the particular sensor being used and the receiving circuitry inside the NAVITWIN IV.Therefore, a new calibration must be carried out when:- the steering magnetic compass is exchanged or newly adjusted,- the magnetic heading sensor is exchanged and,- if a fluxgate sensor is used, when the NAVITWIN IV itself is exchanged.

CAUTION The magnetic compass used as the calibration reference must be prop-erly installed and adjusted.The procedure should be carried out in calm seas only.Make sure that ample sea area is available for the vessel to execute a very slow 360°-turn.

Magnetic Heading Calibration 5-3


Determining magnetic heading correction values

1. Make sure that the magnetic variation is set to 0.0° in the Manual Settings menu.

2. Make sure that the calibration is disabled (option ’use cal tab’ unchecked) in the User Setup / Magn. Cal. Tab.

3. Select a manual steering mode.

4. Commence a continuous, very slow and steady turn. The vessel must turn through one full circle (360°) at least.

5. While the vessel is turning, com-pare the indication at the steer-ing magnetic compass with the magnetic heading values shown on the NAVITWIN IV display.

At every full 10° of steering magnetic compass heading (0°, 10°, ... , 350°), note the display value.

6. Enter the observed display val-ues in the magnetic heading cal-ibration table (blank form included in [] of this manual).

7. Calculate the required correc-tion value for each heading value.

The correction value is the offset which must be applied to a given display value in order to obtain the steering magnetic compass heading.

Example:steering magnetic compass heading = 0°,display value = 0,8°,correction value = –0,8°.

0

Mag. CompassHeading

Mag. HDGDisplay

(uncalibrated)

CorrectionValue

10

MAGN

COMP 000.8

0

Mag. CompassHeading

Mag. Hdg.Display

(uncalibrated)

CorrectionValue

10

0˚

Mag. CompassHeading

Mag. Hdg.Display

(uncalibrated)

CorrectionValue

10˚

– mag. hdg. display= correction value

mag. compass hdg.

5-4 Magnetic Heading Calibration


Storing the magnetic heading calibration table

1. Call up the User Setup and go to ’Magn Cal Tab | Enter Values’.

Press ENTER.

The calibration table entry screen is shown.

2. Enter the previously determined correc-tion values:

a) With the Up/Down arrow keys, select the entry (’cal. no.’) to be edited.

b) Press ENTER to confirm the cal. no./heading value1.

The cursor jumps to the ’diff.’ line.

c) Using the Up/Down and Left/Right arrow keys, enter the required cor-rection value (’diff.’).

d) Press ENTER to confirm the correction value.

e) To enter another correction value, press ENTER again.

The cursor returns to the ’cal. no.’ line.

Repeat the procedure from step a) above until all correction values have been entered.

3. Press MENU to quit the table entry screen.

1 The magnetic heading values are hard assigned to cal. numbers:Entry 00 holds the correction value for a heading of 0°, entry 01 holds the calibration value for a heading of 10° etc.

MAIN MENU

USER SETUP

MAGN CAL TAB

0˚

Mag. CompassHeading

Mag. Hdg.Display

(uncalibrated)

CorrectionValue

10˚

USE CAL TABLEENTER VALUES

CAL NO.: 00

DEL CAL:

DIFF:

HEADING: 000

NO

CAL NO.: 00

DEL CAL:

DIFF:

HEADING: 000

NO

Magnetic Heading Calibration 5-5


Deleting entries from the magnetic heading calibration table

When a complete new calibration is carried out, it is recommended to delete old entries from the calibration table first.

Also, if the determined correction values are comparatively small, it is generally sufficient to enter only a few values for the headings where the largest deviations occur. By deleting the correction value from a table entry, the entry is made inactive and the correction applied at the respective heading is instead calculated by interpolating between the two adjacent active entries.

To delete entries from the magnetic heading calibration table:

1. Call up the User Setup and go to ’Magn Cal Tab | Enter Values’.

Press ENTER.

The calibration table entry screen is shown.

2. Delete correction values:

a) With the Up/Down arrow keys, select the entry (’cal. no.’) to be edited.

b) Press ENTER to confirm the cal. no. Press ENTER again to move the cursor down to the ’del. cal.’ line.

c) Press the Down arrow key to select “YES”.

d) Press ENTER to confirm deletion.

e) The cursor returns to the ’cal. no.’ line.

If required, repeat the procedure from step a above to delete another value.

3. Press MENU to quit the table entry screen.

MAIN MENU

USER SETUP

MAGN CAL TAB

USE CAL TABLEENTER VALUES

CAL NO.: 00

DEL CAL:

DIFF:

HEADING: 000

NO

CAL NO.: 00

DEL CAL:

DIFF:

HEADING: 000

YES

5-6 Magnetic Heading Calibration


Chapter 6: System Configuration

6.1 Service Setup Menu

The Service Setup menu provides access to the system parameters which configure the NAVITWIN IV according to the requirements of the installation at hand.

Setup Access Code

To prevent inadvertent or unauthorized changes to the system configu-ration, setup menus which are to be accessed by service personnel only are protected by access codes.

To access the Service Setup:

MAIN MENU

SERVICE SETUP

ENTER CODE

000

CONFIRM = ENTER

Go to the SERVICE SETUP

When prompted for the setup code:

Enter code "600 " Press ENTER to confirm the code..

The Service Setup sub-menu opens.SERVICE SETUP

GYRO 1GYRO 2


Service Setup Menu 6-1


Service-Setup – Overview

Figure 6-1:

Service SetupGYRO 1

INTERFACE TYP

OFF

COMPASS NAME

GYRO

NMEA NAVIGAT

PLATH BINARY

NMEA-HDT

GYRO 1

GYRO 2

GYRO 3

FOG

FOG 1

FOG 2

FOG 3

NAVISTAR

USERNAME

settings for Gyro 1 input

GYRO 2

INTERFACE TYP

OFF

COMPASS NAME

GYRO

NMEA NAVIGAT

PLATH BINARY

NMEA-HDT

GYRO 1

GYRO 2

GYRO 3

FOG

FOG 1

FOG 2

FOG 3

NAVISTAR

USERNAME

settings for Gyro 2 input

contd. on next page

SERVICE SETUP

GYRO 1GYRO 2

6-2 Service Setup Menu


Figure 6-2:

Service Setup(contd.)

GYRO 3/MAGN

G3 INTERFACE

OFF

COMPASS NAME

GYRO

NMEA NAVIGAT

PLATH BINARY

NMEA-HDT

GYRO 1

GYRO 2

GYRO 3

FOG

FOG 1

FOG 2

FOG 3

NAVISTAR

USERNAME

INTERFACE TYP

settings for Gyro 3 / Magn. input

SET HDG./GPS

PROTOCOL

NMEA 4800

SET NMEA

GLL/GGA

NAVIPILOT

NMEA 9600

OFF

ZDA

VBW/VHW/VTG

MVAR RMC/RMA

HTD/HTC/ASD

settings for set hdg./GPS input

contd. on next page


MAGN. COMP.

INTERFACE TYP

OFF

HCHDG

HCHDT

COMPASS NAME

MAGNCOMP

FLUXGATE

USERNAME

HCHDM

SIN/COS

SERVICE SETUP

GYRO 3/MAGNSET HDG./GPS



Figure 6-3:



SERVICE SETUP

RS422 OUTP. 2PORT SETTINGSINTERNALS

PORT SETTINGS

180˚ OFFSET

settings for status input ports

GYRO 1

GYRO 2

GYRO 3

MAGN

PORT 1 MODE

EXT. DIM (+)

G1/G2 CTRL

PORT 2 MODE

EXT. DIM (-)

180˚ OFFSET

G/G3 CTRL

G/M CTRL

RS422 OUTP. 1

MAGN SELECT

HCHDG

HCHDT

HCHDM

settings for serial data output 1

STATUS SELECT

PPLAN

PPNSD

RS422 OUTP. 2

BAUDRATE

4800

19200

38400

9600

PPLAA/PPLAB/PPLAD

settings for serial data output 2

XXHDT

XXROT

MAGN SELECT

OFF

HCHDM

HCHDG

HCHDT

STATUS SELECT

OFF

PPLAN

PPNSD

contd. on next page



Figure 6-4:



SERVICE SETUP

INTERNALS

FACTORY SETTINGS

LCD COLOR

system-internal settings

GYRO1 NAME

(editable string; 8 chars. max.)

reset all setup parameters to factory settings

GYRO2 NAME

(editable string; 8 chars. max.)GYRO3 NAME

(editable string; 8 chars. max.)MAGN NAME

(editable string; 8 chars. max.)

GRAY STYLE

BLUE STYLE

BLACK STYLE

INDIVIDUAL NAME

INTERNALS< BACK



Service Setup – Parameters

Gyro 1

Configures the Gyro 1 input.

InterfaceTyp

Selects the interface protocol for the Gyro 1 input.

Settings: OFF

The input is disabled

NMEA-HDT

The input reads the NMEA $--HDT sentence

NMEA NAVIGAT

The input reads NMEA data from a Sperry NAVIGAT X MK 1, X MK 2, or 2100 gyrocompass

PLATH Binary

The input reads the PLATH binary data protocol

Comp. Name

Selects the displayed name for the device at the Gyro 1 input.

Settings: GYRO

GYRO 1

GYRO 2

GYRO 3

FOG

FOG 1

FOG 2

FOG 3

NAVISTAR

USERNAME (editable under Service Setup | Internals)



Gyro 2


InterfaceTyp


Settings: OFF


NMEA-HDT


NMEA NAVIGAT

The input reads NMEA data from a Sperry NAVIGAT X MK 1, X MK 2, or 2100 gyrocompass

PLATH Binary


Comp. Name


Settings: GYRO

GYRO 1

GYRO 2

GYRO 3

FOG

FOG 1

FOG 2

FOG 3

NAVISTAR




Gyro 3/Magn.

Configures the Gyro 3 and Magnetic Heading inputs.

G3 Interface


Interface Typ


Settings: OFF


NMEA-HDT


NMEA NAVIGAT

The input reads NMEA data from a Sperry NAV-IGAT X MK 1, X MK 2, or 2100 gyrocompass

PLATH Binary


Comp. Name


Settings: GYRO

GYRO 1

GYRO 2

GYRO 3

FOG

FOG 1

FOG 2

FOG 3

NAVISTAR




Magn. Comp.

Configures the Magnetic Heading input.

Interface Typ

Selects the interface and protocol fot the magnetic heading input.

Settings: OFF


HCHDG

The input input reads the NMEA $HCHDG sen-tence at the G3/MAG interface

HCHDT

The input input reads the NMEA $HCHDT sen-tence at the G3/MAG interface

HCHDM

The input reads the NMEA $HCHDM sentence at the G3/MAG interface

SIN/COS

The input reads analogue voltages from a Sperry Marine fluxgate sensor type 4863 at the analogue fluxgate interface

Comp. Name

Selects the name for the device at the magnetic heading input.

Settings: MAGNCOMP

FLUXGATE


Note When the magnetic heading is to be read from a NMEA sentence at the serial interface, the Gyro 3 input must be disabled.



Set Hdg./GPS

Configures the Set Hdg./GPS input.

Protocol

Selects the interface protocol for the Set Hdg./GPS input.

Settings: OFF

The Set Hdg./GPS input is disabled

NMEA 4800

The Set Hdg./GPS input reads the NMEA data at 4800 Bd.

NMEA 9600

The Set Hdg./GPS input reads the NMEA data at 9600 Bd.

NAVIPILOT

The Set Hdg./GPS input reads the NAVIPILOT protocol

Set NMEA

Selects the evaluated input sentences in NMEA mode.

Settings: GLL/GGA

The input may receive position using the $--GLL or $--GGA sentences

ZDA

The input may receive date and time using the $--ZDA sen-tence

VBW/VHW/VTG

The input may receive speed using the $--VBW, $--VHW or$--VTG sentence

MVAR RMC/RMA

The input may receive magnetic variation using the $--RMC or $--RMA sentences

HTD/HTC/ASD

The input may receive set heading using the $--HTD, $--HTC or $AGASD sentences



RS422 Outp. 1

Configures the RS-422 output 1 and the TTL serial data outputs.

Magn. Select

Selects the output sentence for magnetic heading data.

Settings: HCHDG

Magnetic heading is sent using the NMEA $--HDG sentence with talker ID “HC”

HCHDM

Magnetic heading is sent using the NMEA $--HDM sentence with talker ID “HC”

HCHDT

Magnetic heading is sent using the NMEA $--HDT sentence with talker ID “HC”

Status Select

Selects the output sentence for nav. status data (proprietary sentences)1.

1 $PPLAN (IEC 61162-conformant) should be selected unless older peripheral equipment requires the $PPNSD sentence.

Settings: PPLAN

Nav. status data is sent using the $PPLAN sentence

PPNSD

Nav. status data is sent using the $PPNSD sentence



RS422 Outp. 2

Configures the RS-422 serial data output 2.

Bd. Rate

Selects the transmission baud rate

Settings: 4800

Data is transmitted at 4800 Baud(standard according to NMEA / IEC 61162-1)

9600

Data is transmitted at 9600 Baud(non-standard)

19200

Data is transmitted at 19200 Baud(non-standard)

38400

Data is transmitted at 38400 Baud(high-speed according to IEC 61162-2)

Magn. Select

Selects the output sentence for magnetic heading data.

Settings: OFF

Magnetic heading data is not transmitted

HCHDG

Magnetic heading data is transmitted using the $--HDG sen-tence with talker ID “HC”

HCHDM

Magnetic heading data is transmitted using the $--HDM sen-tence with talker ID “HC”

HCHDT

Magnetic heading data is transmitted using the $--HDT sen-tence with talker ID “HC”

Status Select

Selects the output sentence for nav. status data (proprietary sentences)1.

1 $PPLAN (IEC 61162-conformant) should be selected unless older peripheral equipment requires the $PPNSD sentence.

Settings: OFF

Nav. status data is not transmitted

PPLAN

Nav. status data is transmitted using the $PPLAN sentence

PPNSD

Nav. status data is transmitted using the $PPNSD sentence



PPLAA/PPLAB/PPLAD

Selects whether the NAVITWIN op. data sentences are transmitted (proprietary sentences $PPLAA, $PPLAB and $PPLAD).

Settings: ON (option checked)The NAVITWIN op. data sentences are transmitted

OFF (option unchecked)The NAVITWIN op. data sentences are not transmitted

XXHDT

Selects whether true heading data is transmitted ($--HDT sentence).

Settings: ON (option checked)True heading data is transmitted using the $--HDT sen-tence with the talker ID of the currently active source(talker=“HE” if source uses PLATH format)

OFF (option unchecked)True heading data is not transmitted

XXROT

Selects whether rate of turn data is transmitted ($--ROT sentence).

Settings: ON (option checked)Rate of turn data is transmitted using the $--ROT sentence with the talker ID of the currently active source(talker=“TI” if source uses PLATH format)

OFF (option unchecked)Rate of turn data is not transmitted



Port Settings

Configures the status input ports.

Port 1 Mode

Selects the function of status input port 1.

Settings: EXT. DIM (+)

The port is used for external dimming; brightness is increased one step when input contact is closed

G1/G2 CTRL

The port is used to read back the source selection status from the Switch-Over Unit. Status “G2” recognized when input contact is closed

Port 2 Mode

Selects the function of status input port 2.

Settings: EXT. DIM (-)

The port is used for external dimming; brightness is decreased one step when input contact is closed

180° OFFSET

The port is used to reverse the heading display (e.g. for use in double-ended ferries). 180° offset is applied when input contact is closed

G/G3 CTRL

The port is used to read back the source selection status from the Switch-Over Unit. Status “G3” recognized when input contact is closed

G/M CTRL1

The port is used to read back the source selection status from the Switch-Over Unit. Status “M” recognized when input contact is closed

1 For future use; required “M” status signal is not provided by Switch-Over Unit type 4932.



180° Offset

Selects the applicable heading sources for the 180° Offset function

Settings: GYRO 1

ON (option checked):Gyro 1 heading is reversed when 180° Offset is active.OFF (option unchecked):Gyro 1 heading is not reversed when 180° Offset is active.

GYRO 2

ON (option checked):Gyro 2 heading is reversed when 180° Offset is active.OFF (option unchecked):Gyro 2 heading is not reversed when 180° Offset is active

GYRO 3

ON (option checked):Gyro 3 heading is reversed when 180° Offset is active.OFF (option unchecked):Gyro 3 heading is not reversed when 180° Offset is active

MAGN

ON (option checked):Magnetic heading is reversed when 180° Offset is active.OFF (option unchecked):Magnetic heading is not reversed when 180° Offset is active



Internals

Accesses system-internal parameters.

Factory Settings

Resets all configuration parameters to factory defaults.

Settings: none

Selecting “Factory Settings” and pressing the “Enter” key resets all configuration parameters to the factory defaults

Individual Name

Sets the user-editable names for the heading source inputs.

Settings: GYRO1 NAME

Sets the name for the Gyro 1 input sourceeditable string, max. 8 alphanumeric characters

GYRO2 NAME


GYRO3 NAME


MAGN NAME

Sets the name for the magnetic heading input sourceeditable string, max. 8 alphanumeric characters

LCD Color

Selects the display colour scheme

Settings: Gray Style

The heading source window has a gray background.

Blue Style

The heading source window has a blue background.

Black Style

The heading source window has a black background.



Chapter 7: Troubleshooting

7.1 General Troubleshooting Instructions

The NAVITWIN IV is a complex electronic device. In case of malfunction, it would neither be practical nor economical to carry out troubleshooting and servicing in the field down to the level of individual circuit compo-nents.

Unless instructed otherwise by Sperry Marine engineering, field service personnel should limit troubleshooting to:

• Visual inspection of mechanical components, the PCB and wiring.

• Continuity checks of wiring connections.

• Checks for short circuit or overload conditions or reversed polarity of the external supply power.

• Checks of the on-board supply voltages and I/O signals and data.The presence of voltages, signals and data is indicated by diagnostic LEDs on the PCB.Exact voltage levels must be checked with a voltmeter.The data content on serial I/O lines must be checked with the aid of suitable analyzing tools, such as PC-based protocol interpreters or terminal programs.

When components on the PCB, other than socketed ICs or the exchange-able system software flashboard, are assumed to cause malfunction, the complete NAVITWIN IV operating unit is to be exchanged.



are touched.







General Troubleshooting Instructions 7-1


7.2 Location of Parts on the NAVITWIN IV PCB

Figure 7-1 below shows the locations of exchangeable components, connectors and diagnostic LED indicators on the NAVITWIN IV PCB.

Figure 7-1:

location of parts on theNAVITWIN IV PCB

CR 15

CR 13

CR 21

CR 16

CR 29

CR 34

J 6

CR 35

CR 36

CR 37

CR 49

CR 50

CR 52

CR 53

CR 54

CR 45

CR 46

J 1

CR 30

CR 32

CR 48

CR 58

CR 59

CR 57

CR 33

Flashboard

J 4

J 2

IC 4

WARNINGdanger of electrical shock

or burn when CCFL inverter

connections are touched

7-2 Location of Parts on the NAVITWIN IV PCB


Exchangeable Components

Table 7-1:

Exchangeable compo-nents on the

NAVITWIN IV PCB

Connectors

Table 7-2:

Connectors on theNAVITWIN IV PCB

Part Function Stock No.

Flash-board

Flahsboard (flash-memory card),pre-programmed with system software

020684-0000-000

IC 4 quad RS-422 output driver IC;drives serial data RS-422 outputs 1 and 2

046485-0000-000

Function

J 1 Socket for buzzer hi/lo jumper1;

1 J1 must be placed across pins 1 and 2 (buzzer hi) in normal operation. Placing J1 across pins 2 and 3 (buzzer lo) is permitted only to tempo-rarily silence buzzer during service.

J 2 RS-232 service interface connector

J 4 Socket for exchangeable system software flashboard

J 6 50-pin Sub-D I/O connector

Location of Parts on the NAVITWIN IV PCB 7-3


Diagnostic LEDs

As an aid in troubleshooting, a number of diagnostic LED indicators are provided on the NAVITWIN IV PCB. These indicate the presence of sup-ply voltages, activities on the serial data I/O lines and the current states of the status I/O ports.

Table 7-3:

Diagnostic LEDsLED Colour Indication

CR 15 green flashes with activity on Tx line, ser. data TTL

CR 16 green flashes with activity on Tx line, ser. data RS-422 2

CR 21 green flashes with activity on Tx line, ser. data RS-422 1

CR 29 green lit when +3.3 VDC (Vcc) on-board supply present

CR 30 green lit when +5 VDC on-board supply present

CR 32 green lit when –12 VDC on-board supply present

CR 33 green lit when +12 VDC on-board supply present

CR 34 green lit when status input closed, Ext. Dim+

CR 35 green lit when status input closed, Offset 180°/ Ext. Dim-

CR 36 green lit when status input closed, Auto/Man

CR 37 green lit when status input closed, Mute

CR 45 green flashes with activity on Rx line, Gyro 2 input

CR 46 green flashes with activity on Rx line, Gyro 1 input

CR 48 green lit when status output active, G1/G2

CR 49 green lit when relay attracted, K1, watch alarm trigger

CR 50 green lit when relay attracted, K2, off heading alarm

CR 52 green lit when relay attracted, K3, pwr. failure/gen. alarm

CR 53 green flashes with activity on Rx line, Gyro 3/Mag input

CR 54 green flashes with activity on Rx line, Auto/GPS input

CR 57 green lit when status output active, G/G3

CR 58 green lit when status output active, G/M

CR 59 green lit when relay attracted, K4, heading diff. alarm

7-4 Location of Parts on the NAVITWIN IV PCB


Chapter 8: Corrective Maintenance

The NAVITWIN IV is generally not field-serviceable on the component level. Defective devices must be sent back to Sperry Marine for repair.

The only corrective maintenance procedures which may be performed by field service personnel are the exchange of the system software and the replacement of the serial RS-422 output driver IC.

8.1 Exchanging the System Software

Downloading Software from the Flashboard

The NAVITWIN IV keeps two separate copies of the system software, one in an onboard flash memory and the other on the exchangeable software flashboard 20684.

The system always boots up from the onboard memory. Should, at power-up, a different software version be found on the flashboard than is currently stored onboard, the software from the flashboard is auto-matically copied to the onboard memory and the system is restarted.

This allows both to upgrade to newer and to downgrade to previous releases by simply exchanging the flashboard.



are touched.







CAUTION It cannot be guaranteed that parameters settings in the User and Setup menus and the entries made in the Magnetic Compass Calibration table are left intact during the software download.Before exchanging the flashboard, record all parameter settings to be able to re-enter them manually, if required.

Exchanging the System Software 8-1


Exchanging the Flashboard

1. Disconnect the 50-pin plug connector from the back of the NAVITWIN IV.

2. In case of a console or frame-mounted device, unmount the NAVITWIN IV from the console and remove the back cover.In case of a device in housing with bracket, unscrew the back cover and remove the NAVITWIN IV insert from the housing.

3. Place the NAVITWIN IV insert face-down on a flat, clean surface.

4. Carefully remove the plastic pin which secures the flashboard to the main PCB.

5. Pull the old flashboard out of its socket, making sure to touch it at the edges only.

6. Insert the new flashboard into the socket.

7. Secure the flashboard with the plastic pin.

8. In case of a console or frame-mounted device, reattach the back cover and mount the NAVITWIN IV in the console.In case of a device in housing with bracket, insert the NAVITWIN IV in the housing and screw on the back cover.

9. Connect and secure the 50-pin plug connector to the back of the housing.

10. Power-up the NAVITWIN IV.

11. The NAVITWIN IV shows a blank display at maximum brightness for several minutes. This indi-cates that the software is being downloaded from the flash-board to the onboard memory.

CAUTION Do not disconnect power or otherwise interrupt the power-up process after an exchange of the flashboard.

8-2 Exchanging the System Software


Uploading Software via the Service Interface

The system software may also be uploaded from a PC or laptop via the RS-232 service interface on the NAVITWIN IV PCB.

At the time of writing of this manual, however, an upload program for field service use is not yet available. Sperry Marine will issue an official Service Bulletin as soon as such a program becomes available.

8.2 Replacing the RS-422 Output Driver IC

The RS-422 output driver, IC 4, is a socketed 16-pin DIL chip. If failure or malfunction of the RS-422 outputs is attributed to a defective driver IC, the chip can easily be replaced against a new one.

The driver IC is a standard quadruple RS-422 line driver (MC3487), avail-able from Sperry Marine Hamburg as part no. 46485.

12. When the software download is complete, the NAVITWIN IV automatically restarts.

13. If a “EEPROM DATA INVALID” message is shown, the new soft-ware requires the setup mem-ory to be restored to factory settings. Press the ACK key to continue the power-up sequence.

14. Check the parameter settings in the User and Service Setup menus and the entries in the magnetic heading calibration table.Re-enter any settings which may not have been preserved.

Note If the “EEPROM DATA INVALID” message was shown during the power-up, the parameters settings in all menues and the entries in the magnetic heading calibration table will have been restored to factory settings.All parameters in the User and Service setups, the Manual settings and the magnetic heading calibration table will have to be re-entered as required for the given system.

Replacing the RS-422 Output Driver IC 8-3


8-4 Replacing the RS-422 Output Driver IC


Appendix A: Setup and Configuration Tables

The following tables (blank forms) are appended to this manual:

Designation Drawing No.

NAVITWIN IVPreferred Operational Settings

4994-0125-01

NAVITWIN IVSetup Table

4994-0125-02

NAVITWIN IVMagnetic Compass Calibration Table

4994-0125-03

Note After installation of the NAVITWIN IV, please return a filled-out copy of the Setup Table to Sperry Marine for inclusion in the ship’s file.When permanent changes are made to the system configuration, please return an updated copy of the Setup Table to Sperry Marine.

Northrop Grumman Sperry Marine B.V. (Representative Office)Woltmanstr. 19, D-20097 Hamburg, Germany

Tel.: +49-40-299 00-0, Fax: +49-40-299 00-298, E-mail: [email protected]

0049

94-0

125-

001/

A, 1

6 M

ar 2

006;

Pag

e 1

of

1

NAVITWIN IV

Preferred Operational Settings

Vessel:

IMO No.:

Hull No.:

Shipyard:

Service Station / Installer: Date / Signature:

/

Note Make copies of this form to note the appropriate settings in the Manual Settings and User Setups for normal operation of the equipment.In general, automatic data input modes should be chosen in preference of manual input, wherever possible.

Monitoring Functions

Off Hdg. Alarm Mode:

OFF AUTO MAN

Threshold: °

Hdg. Diff. Alarm Sources:

OFF GY1/GY2 GY1/GY3 GY1/MAGN

GY2/GY3 GY2/MAGN GY3/MAGN

Threshold: °

Manual Settings

Speed Mode AUTO AUTO2 MAN

Position Mode AUTO AUTO2 MAN

Mag Variation AUTO

NAVIPRINT*

* NAVIPRINT settings not implemented in current software. Printer settings must be entered at the compass(es) directly.

ON Paper Speed 60 mm/h

150 mm/h

600 mm/h

Heading

±30°

±180°

Rudder ±9°

±45°

±70°

OFF

Rate of TurnTime Constant: s Max. ROT alarm: °/min.

North Sp. Err. Corr. Err. Corr.

User Setup

Date/Time Mode AUTO

Magn. Cal. Tab. Use Cal. Tab.

0049

94-0

125-

002/

A, 1

6 M

ar 2

006;

Pag

e 1

of

2

NAVITWIN IV

Setup Table

Vessel:

IMO No.:

Hull No.:

Shipyard:


/

Note After installation of the NAVITWIN IV, please return a filled-out copy of the Setup Table to Sperry Marine for inclusion in the ship’s file.When permanent changes are made to the system configuration, please return an updated copy of the Setup Table to Sperry Marine.

Gyro 1

Interface Type OFF NMEA-HDT NMEA

NAVIGAT

PLATH

BINARY

Compass Name GYRO

FOG

NAVISTAR

GYRO 1

FOG 1

USERNAME

GYRO 2

FOG 2

GYRO 3

FOG 3

Gyro 2


NAVIGAT

PLATH

BINARY

Compass Name GYRO

FOG

NAVISTAR

GYRO 1

FOG 1

USERNAME

GYRO 2

FOG 2

GYRO 3

FOG 3

Gyro 3/Magn

- G3 Interface


NAVIGAT

PLATH

BINARY

Compass Name GYRO

FOG

NAVISTAR

GYRO 1

FOG 1

USERNAME

GYRO 2

FOG 2

GYRO 3

FOG 3

- Magn. Comp.

Interface Type OFF HCHDG HCHDT HCHDM

SIN/COS

Compass Name MAGNCOMP FLUXGATE USERNAME

Set Hdg./GPS

Protocol OFF NMEA 4800 NMEA 9600 NAVIPILOT

Set NMEA GLL/GGA

HTD/HTC/

ASD

ZDA VBW/VHW

VTG

MVAR RMC

RMA



0049

94-0

125-

002/

A, 1

6 M

ar 2

006;

Pag

e 2

of

2

RS422 Outp. 1

Magn. Select HCHDG HCHDM HCHDT

Status Select PPLAN PPNSD

RS422 Outp. 2

Baudrate 4800 9600 19200 38400

Magn. Select OFF HCHDG HCHDM HCHDT

Status Select OFF PPLAN PPNSD

Status Data Out PPLAA/PPLAB/PPLAD

HDT Out XXHDT

ROT Out XXROT

Port Settings

Port 1 Mode Ext. Dim (+) G/G2 Ctrl.

Port 2 Mode Ext. Dim (-) 180° Offset G/G3 Ctrl. G/M Ctrl.

180° Offset GYRO 1 GYRO 2 GYRO 3 MAGN

Internals

Individ. NameGYRO1 NAME: GYRO2 NAME:

GYRO3 NAME: MAGN NAME:

LCD Color GRAY STYLE BLUE STYLE BLACK STYLE





0049

94-0

125-

003/

A, 1

6 M

ar 2

006;

Pag

e 1

of

1

NAVITWIN IV

Magnetic Compass Calibration

Table

Vessel:

IMO No.:

Hull No.:

Shipyard:


/

Magnetic

Compass Hdg.

Magnetic

Hdg. Display

(uncalibrated)

Correction ValueMagnetic

Compass Hdg.

Magnetic

Hdg. Display

(uncalibrated)

Correction Value


Appendix B: Drawings

The following drawings are appended to this manual:

Designation Drawing No.

Dimension Drawing:Heading Management System NAVITWIN IVControl and Display Unit in Housing with Bracket

4994-0112-01

Dimension Drawing:Heading Management System NAVITWIN IVControl and Display Unit

4994-0112-02

Dimension Drawing:Console Frame Layout(NAVITWIN IV in console frame, PN 79361)

0031-0112-71

Dimension Drawing:Console Cutout(cutout dimensions 3x1 frame)

0031-0112-02

Wiring Diagram:NAVITWIN IV

4994-0115-01

Cable with D-Plug 4994-2000-00

Note All appended drawings are revision-controlled separately at Sperry Marine. In case of doubt, verify the current revision status of the draw-ings with Sperry Marine. This manual’s revision status does not change when the revision of an appended drawing changes.

NAVITWIN IV.pdf

Documents

Transcript of NAVITWIN IV.pdf