Model PDP DPU Installation, Preparation and...

Model PDP DPU Installation, Preparation and Adjustment

277522 Rev. A2

MAX Control Systems Inc. • 277522 •

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Use this publication as a source for complete and accurate information that helps you better operate orservice MAX Control Systems equipment. Your comments and suggestions are welcome.

MAX Control Systems Inc.1180 Church RoadLansdale, PA 19446

Attention: Manager, Technical Publications

Copyright © 1996, 1997 by MAX Control Systems Inc.Printed in the United States of America

All Rights Reserved


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Contents

Chapter 1: Introduction

Distributed Processing Unit Hardware ...........................................................................1-1Distributed Processing Unit Specifications ....................................................................1-2

Mounting the DPU........................................................................................................................1-2Positioning the DPU .......................................................................................................1-2Mounting Procedures ......................................................................................................1-3

Wiring the DPU ............................................................................................................................1-3

Chapter 2: DPU Front Panel

Mode Select DIP Switch Settings ................................................................................................2-1Data Highway Area ......................................................................................................................2-1

Using Rotary Switches to Set Station Address...............................................................2-2Two LED Displays .........................................................................................................2-2 IOM Load.......................................................................................................................2-3

Status Section (LEDs) ..................................................................................................................2-3 DPU Hardware Status LEDs..........................................................................................2-3Serial I/O and DPU Status Section .................................................................................2-3Backup Status LEDs .......................................................................................................2-4

Reset Button .................................................................................................................................2-4Backup Link..................................................................................................................................2-5CPU Load .....................................................................................................................................2-5Takeover Button ...........................................................................................................................2-5Backup DIP Switch Settings ........................................................................................................2-5DPU Keyswitch ............................................................................................................................2-6

Chapter 3: Input/Output Connections

Input/Output Connections ............................................................................................................3-1Data Highway..................................................................................................................3-1ACSII Ports .....................................................................................................................3-1

Chapter 4: DPU Battery and Fuse Maintenance

Replacing the NiCd Battery Pack (Battery #2)............................................................................4-1Replacing the Lithium Battery (Battery #1).................................................................................4-2Replacing DPU Fuses...................................................................................................................4-3

Model PDP DPU Installation, Preparation and Adjustment


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Chapter 5: Backing Up the DPU

Automatic Failover/Manual Takeover............................................................................5-1Automatic Failover .........................................................................................................5-1Manual Takeover ............................................................................................................5-1Cable Disconnect ............................................................................................................5-2

Chapter 6: Starting the DPU

Startup States ................................................................................................................................6-1Demanding a Cold Startup ...........................................................................................................6-1Starting a Standalone DPU...........................................................................................................6-2Starting a Backup Pair of DPUs...................................................................................................6-3Replacing a DPU in a Backup Pair ..............................................................................................6-5

Chapter 7: Using Interaction Pages

Using Interaction Page 9 Display with a Workstation.................................................................7-1Startup .............................................................................................................................7-1Backup Option ...............................................................................................................7-1Digital Input Filter Time Field........................................................................................7-1Serial Ports Field .............................................................................................................7-1Lockout and Log Options Field......................................................................................7-2

Using Interaction Page 9 Display with an Operator Station........................................................7-2Startup .............................................................................................................................7-4Backup Option Field .......................................................................................................7-4Stat Page Field.................................................................................................................7-4DIO Inventory Field........................................................................................................7-4Digital Input Filter Time Field........................................................................................7-5Analog Input Inventory Field .........................................................................................7-5Redundant I/O Address Ranges Field ............................................................................7-5Lockout and Log Options Field......................................................................................7-5Serial Ports Field .............................................................................................................7-5

Interaction Page 10 .......................................................................................................................7-5Event Queue Pointer Information...................................................................................7-7

Interaction Page 11 .......................................................................................................................7-8Interaction Page 12 .......................................................................................................................7-9Interaction Page 13 .....................................................................................................................7-10

Chapter 8: Alarms and Diagnostics

Front Panel Numeric LEDs.............................................................................................8-1


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Chapter 1

Introduction

Distributed Processing Unit FunctionalityThe Model PDP Distributed Processing Unit (DPU) performs primary dataacquisition, control, and data processing functions for the MAX 1000 Distri-buted Control System. The DPU is a self-contained microprocessor-based,rack-mounted unit, which occupies a single slot in a Remote Processing Unitcabinet. It is designed to operate with user-defined combinations of MAX 1000Model IOP Input/Output Modules, and to communicate with other devices,such as Programmable Logic Controllers and Remote Terminal Units.

As a data highway station, the DPU scans and processes information for use byother devices in the MAX 1000 system. Each DPU performs:

• Comprehensive alarming and calculations.

• Logging of Sequence of Events (SOE) data.

• Acquisition of trend information.

• Continuous scanning of Model IOP I/O modules.

• Execution of predefined Control and Data Blocks for process control anddata acquisition.

• Execution of user written programs in MAX Control Systems EXtendedControl Engineering Language (ExCEL).

• Ladder logic processing.

• Assurance of secure link-level data highway communications.

Distributed Processing Unit Hardware

A DPU consists of three circuit cards installed in a rack-mounted chassis. Theright front chassis panel contains two clockwise and counter-clockwiseconnectors, two serial ports, 10 terminal blocks, and the DPU keylock.

The processor cards mounted behind the gray and white front panel consist ofthe motherboard, Data Highway Card, and the Control Processor Card. TheData Highway Card and Control Processor Card are mounted as daughter cards

Model PDP DPU Installation, Preparation, and Adjustment


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on the motherboard.

Except for the Control Processor Card, the front edge of each processor cardfeatures switches, indicator lamps, and rotary dials that are visible andaccessible from the DPU front panel.

Distributed Processing Unit Specifications

Operating temperature range 0 to 60 degrees C

Storage temperature range (-)25 to 70 degrees C

Relative humidity range 5 to 90% noncondensing

Power requirements 24 Vdc ±4 Vdc, 1.2 amps

Mounting the DPUThe Model PDP Distributed Processing Unit (DPU) is mounted on theMAX 1000 Input/Output (I/O) backplane with Model IOP Input/Outputmodules.

Positioning the DPU

The DPU must be mounted in the right most position of the Model IOP racksince the DPU is wider than the I/O cards and requires good air flow. In a six-wide I/O rack, the mounting bracket to the left of the DPU must be removedsince the DPU requires an I/O panel.

When using a second DPU for backup, it must be mounted vertically adjacentto the primary DPU.

When the DPU is installed in the right most slot, the DPU cover extends overthe J3 and J4 connectors on the back panel. The standard daisy-chain cable(064353) is low profile, however, and will not cause any interference.

Any cables higher than 1 inch above the surface of the backplane, and anyterminators, will interfere with the cover. Some older cables, in particular, willinterfere with the DPU cover. It may be possible to move the terminator to theother end of the daisy-chain or to rearrange the order of the daisy-chain cablesto eliminate the interference.

If this is not possible, a cable adapter is available (MAX Control Systems PartNumber 081580). This adapter has a metal bracket which mounts to the powerstrut and a 12-inch connecting cable plugs into J3 or J4 on the back panel. It isa male-female adapter so that the original cable or terminator can be pluggeddirectly into the adapter out of the way of interference with the DPU.

Introduction


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The DPU is designed to allow installation and removal with the +24 V dcpower supply turned on.

Mounting Procedures

Before mounting any hardware, refer to the cabling and field wiring sections ofPublication 277455, Model IOP Input/Output System Installation and Pre-paration, for information also pertinent to mounting.

To install the DPU in the rack, refer to Chapter 6.

Wiring the DPUWith the exception of the 10 point terminal block on the front panel of the DPUchassis, no hard wiring is required. All connections between the DPU moduleand the DPU chassis are made upon installation into the I/O rack. Use theConfiguration Builder package to create input designations for each DPUduring configuration.

Ten terminal board connectors, with #6 screws, are positioned at the lower leftside of the DPU chassis. Pin-outs are as follows:

Table 1-1. Ten Point Terminal Block

PIN No. Purpose

1-6 Reserved

7 Open

8, 9 DPU offline contact (photovoltaic relay, opens when the DPUis offline)

Peak operating voltage = ±300VMaximum load = 60 mAOn resistance = 30 OhmsOff resistance = 1 mOhms (Contact is closed if DPU is online)

10 Circuit Ground


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Chapter 2

DPU Front Panel

OverviewAll DPU controls, indicator lamps, keylock, and switches are located on theDPU front panel. Refer to Figure 2-1, DPU Front Panel. Use this front panel tomonitor or control different aspects of the DPU. This chapter describes andillustrates individual sections. Thevarious front panel features aregenerally positioned in two verticalpanel areas corresponding tosupporting processor card positionsmounted behind the front panel.

Mode Select DIP Switch SettingsThe mode switches, located at thetop of the front panel, are usedduring DPU manufacturing andtesting. For normal DPU operation,all four switches should be set to theleft. Setting the B (Blank database)SW8, 2, 1 to the left, and SW4 tothe right during power on or resetcauses the DPU to erase its databaseand come up cold. Once the DPU isoperational (DPU on highway), besure to set the mode switches backto the left.

Data Highway AreaThe Data Highway Area, (Figure 2-2), located in the upper right area ofthe gray front panel, consists of:

• Two toggle switches used tointentionally break the CW and/or

Figure 2-1.DPU Front Panel



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CCW highway connections to this DPU to simulate communications loss forsystems testing (e.g., cable break reporting) without actually disconnectingcables.

• Jabberhalt error LED to indicate timeout of excessively long transmissions.• Two rotary switches to provide the station address; refer to next section.• Two LED displays; refer to "Two LED Displays."

There are no internal switches or jumpers to be set during installation.

Using Rotary Switches to Set Station Address

Use the two rotary switches to configure a unique DPU highway stationaddress, a number ranging from 32 and 63; the station number is set inhexadecimal (hex). The upper switch sets the most significant digit of theaddress (e.g., 3 for Station 50). The lower switch sets the least significant digitfor the address (e.g., 2 for Station 50).

Hexadecimal Decimal

0 01 12 23 34 45 56 67 78 89 9A 10B 11C 12D 13E 14F 15

To convert a two-digit hexadecimalnumber to decimal, multiply the first digitby 16 and add the decimal value of thesecond digit.

2C hex = 2 * 16 + C= 32 + 12= 44

To convert decimal to hexadecimal,divide the decimal number by 16 until aremainder of less than 16 is obtained:

50 decimal = 50÷16 = 3 (hex)with 2 (2 hex) remainder= 32 hex

Two LED Displays

The two seven-segment LED displays report highway status using hexnumbers. During DPU startup, the LEDs display FF. When the DPU concludesits startup phase, the LEDs alternately display the codes 03, 04, and 07 toindicate:

(03) query response transfer is in progress(04) token passing is in progress(07 the DPU is executing normal background functions

DPU Front Panel


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If an error occurs in the DPU, causing it to fail, these LEDs display an errorcode. Refer to Chapter 8 for a listing of error codes.

IOM Load

MAX Control Systems FactoryService use only.

Status Section (LEDs)The middle area of the frontpanel contains 11 tri-coloredLEDs (green, red, and yellow).Refer to Figure 2-3. The LEDsindicate the status of a variety oftasks, such as I/O bus scanning.Refer to the following tables fora list of definitions for thecolor-coded LEDs.

DPU Hardware StatusLEDs

The first three LEDs specifically relate to DPU hardware status.

LED What the Colors Mean

Active Green = DPU online and active.Offline Red = DPU offline.Inactive Yellow = DPU online but inactive (backup pair).

Battery Red = nickel cadmium or lithium battery bad.Yellow = nickel cadmium battery under test.Green = both batteries good.

Power Green = DPU powered.

Serial I/O and DPU Status Section


Serial port1 Green = serial port 1 transmitting.Red = serial port 1 receiving.

Serial port2 Green = serial port 2 transmitting.Red = serial port 2 receiving.

Figure 2-2. Upper Front Panel Area



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Status Section LED Indicators

DI Fast Digital Input Scanning:

green = all points good red = all points bad yellow = some points good and some points badoff = no points executing

DO Fast Digital Output Scanning:

green = all points goodred = all points badyellow = some points good and some points badoff = no points executing

Per IO Periodic Input/Output scanning Analog Inputs, Control Blocks,Data Blocks

green = all points goodred = all points badyellow = some points good and some points badoff = no points executing

Prog IO ExCEL Input/Output Scanning

green = all points good red = all points bad yellow = some points good and some points badoff = no points executing

Backup Status LEDs

The following two LEDs report backup link status.


RX green = Receiving data.TX green = Transmitting data.

Reset Button The Reset pushbutton does not produce a true hard reset; when you press thisbutton, the DPU receives a false indication of impending +24 Volt power loss,causing the DPU to save the database into flash memory and wait for a powerdown that never occurs. However, a deadman timer associated with the ControlProcessor Card will cause a true hard reset after this routine finishes, afterwhich a cool initialization will occur.

DPU Front Panel


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Backup LinkWhen used with a backup DPU, a cable (Part 081387) runs between thisconnector on both DPUs.

When used without a backup DPU, a terminator (Part 081388) must beinstalled in this connector.

CPU LoadFor MAX Control Systems FactoryService use only.

Takeover ButtonWhen two DPUs are used in abackup configuration, press theTakeover button on one of the DPUsto force that DPU to take control,making the other inactive.

Backup DIP Switch SettingsUse the four-position backup DIP switch to select various DPU backupconfigurations. If backup is not configured, the top most switch should be set tothe right and the others to the left. Refer to Chapter 5.

The first position (top) on the DIP switch lets you designate the DPU asprimary or secondary. Primary is to the right.

The second position designates a separate or shared parallel input/output bus.Common (Shared) is to the left. Separate is to the right.

Note: if you are configuring a mixed I/O system using some shared and someseparate I/O with a Y-Adapter, select Separate.

The third position designates a separate or shared link connected to serial port1. Separate is to the right. Common (Shared) is to the left.

The fourth position designates a separate or shared link connected to serial port2. Separate is to the right. Common (Shared) is to the left.

Figure 2-3. Status LEDs



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DPU KeyswitchUse the DPU keyswitch, located at the bottom part of the DPU chassis, toselect one of three operator modes. The DPU can operate with the key in placeor removed; you can remove the key from the switch regardless of keyposition.

The keyswitch may be placed in one of the following three positions:

Run Keyslot horizontal

The DPU executes the functions defined in its point database. Inthis mode, you are permitted to reload a DPU database; howeveryou cannot configure Interaction Page 9.

Offline Keyslot diagonal, one-quarter turn counterclockwise from Run.

In this mode, the DPU scans inputs but does not execute outputs.To service the DPU, you may manually select offline by turningthe keyswitch to this position.

Offline is imposed automatically with the keyswitch in run orlocked position when a fatal diagnostic is detected.

Locked Keyslot diagonal, one-quarter turn clockwise from Run.

In this mode, the DPU executes the functions defined in its pointdatabase. Reloads and database changes may or may not bepermitted, depending on the DPU configuration as shown onInteraction Page 9.


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Chapter 3

Input/Output Connections

Input/Output ConnectionsData Highway

The upper left portion of the DPU chassis features two groups of male andfemale 9-pin D-type connectors used to connect the clockwise (CW) andcounter-clockwise (CCW) Data Highway cables. Positions J2 and J3 are forCW connections, and J4 and J5 are for CCW. For additional information onInput/Output connections, refer to Publication 277274, Data Highway Cabling.

ACSII Ports

Directly below the Data Highway connections are two female 25-pin D-typeconnectors (J6 and J7) which serve as ASCII serial ports. Table 3-1 providesthe pin-outs for both ports. These two ASCII ports provide linkage toprogrammable logic controllers, remote multiplexers, etc. Connections can beRS-232, RS-422, or RS-485, chosen without jumpers, with proper connectionto the 25-pin D-Connectors. When you define a DPU via the ConfigurationBuilder, you may configure setup parameters, such as baud rate, parity, andnumber of stop bits. You may also enter setup information directly onInteraction Page 9. Remember, when you add this information, you must takethe DPU offline.

Table 3-1. ASCII Port Pin-outs (usable via ExCEL, Rev. 2)

Pin No. Purpose

24 Transmit Data TxD + (RS-422) 2 Transmit Data TxD - (RS-422), or TxD (RS-232/423) 23 Receive Data RxD + (RS-422) 3 Receive Data RxD - (RS-422), or RxD (RS-232/423) 4 Request-to-Send RTS (RS-232/423)5 Clear-to-Send CTS (RS-232/423)7 Circuit Ground1 Chassis Ground


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Chapter 4

DPU Battery and Fuse Maintenance

Battery Types

The Model PDP DPU uses two battery types that must be replaced periodically.A Nickel Cadmium (NiCd) rechargeable battery pack, mounted on themotherboard, allows the DPU to preserve its database when power goes down.This battery, tested for one minute every hour, will raise a "bat-tery #2 weak"battery low alarm if it fails.

The DPU Control Processor Card uses a 360 maH Lithium battery to preserveCMOS settings and time and date. If this battery fails, a "battery #1 weak"battery low alarm will be raised. The battery has a shelf life of 10 years under"no load" conditions. When the DPU is powered, the battery is electronicallydisconnected. The Control Processor Card battery will last for more than twoyears if no power is applied to the board.

Caution: The DPU contains devices that can be damaged by electrostaticdischarge. It is imperative that the DPU be carried in antistatic protectivebags. Grounded workstations and wrist straps must be used when adjustingor performing any work on the DPU. If soldering irons are used, they mustalso be grounded.

Replacing the NiCd Battery Pack (Battery #2)

Note: when the DPU is shipped or put in storage, always unplug the NiCdbattery pack from the P10 connector.

The DPU NiCd battery pack (Part number 081537) should be replaced at leastevery three years. Spare NiCd battery packs have a shelf life of 5 to 7 years.

The battery is located in an accessible compartment on the upper right side ofthe DPU. To access the battery, you must remove the DPU from the rack asdescribed in the following procedure:



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To replace the battery:

1. Important: If the DPU to be serviced is part of a DPU pair, use theinstructions in Chapter 6, "Replacing a DPU in a Backup Pair," to extractthe DPU. If the DPU to be serviced is configured standalone, place thekeyswitch in the offline position and use the following instructions.

Gently slide the DPU module out of the cabinet rack and set the unit downon an appropriate work surface, component side up.

2. Locate the battery compartment on the upper right side.

3. Remove the battery plug connector from the P10 port.

4. Remove the failed battery from its holder clips and dispose of itappropriately.

5. Slide the new battery pack in between the holder clips and plug the battery'splug connector into the P10 port.

6. Install the DPU in the chassis using the appropriate procedure found inChapter 6," Starting a Standalone DPU," or "Replacing a DPU in a BackupPair."

Replacing the Lithium Battery (Battery #1)The Lithium battery is mounted on the Control Processor board. Replace thebattery with a 360mAh TLS186 Tadiran battery or equivalent. (Part number081558).

To replace the battery:

1. Important: If the DPU to be serviced is part of a DPU pair, use theinstructions in Chapter 6, "Replacing a DPU in a Backup Pair" to extract theDPU. If the DPU to be serviced is configured standalone, place thekeyswitch in the offline position and use the following instructions.

Gently slide the DPU module out of the cabinet rack and set the unit downon an appropriate work surface, component side up.

2. Remove the top metal cover.

3. Locate the battery. It is on the top side of the Control Processor board nearthe DB25 connector.

4. Carefully remove the battery by pulling it straight up. Do not use any metaltools since they could short the battery leads. Additionally, do not place any

DPU Battery and Fuse Maintenance


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pressure on the circuits near the battery.

5. Install the battery into the same connector from which the old battery wasremoved (B1). Make sure that the (+) lead, the center of the battery, plugsinto the end pin of the connector marked with the (+) on the board. Thesecond lead (-) should go into the fourth pin on connector B1.

6. Install the metal cover.

7. Install the DPU in the chassis using the appropriate procedure found inChapter 6," Starting a Standalone DPU," or "Replacing a DPU in a BackupPair."

Replacing DPU FusesThe DPU has two fuses, located on the motherboard, marked F1 and F2. Bothfuses are subminiatures (resemble resistors). Fuse F1, 3A (Part number014257), is used for external battery power. Fuse 2, 3A (Part number 014257),is used for 24V power. They are both mounted directly to the board by theirleads and plugged into sockets.

To change the fuses, follow the same procedure for changing the lithiumbattery, as described in the previous section, locate and replace the fuses.


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Chapter 5

Backing Up the DPU

OverviewIn a redundant configuration, two DPUs are connected to form a backup pair.One DPU is designated as the primary unit and the other DPU the secondaryunit. The data highway station address of the secondary station is one numbergreater than the address of the primary station.

The installation, preparation, and adjustment procedures included in thispublication apply to both DPUs in a redundant configuration. This chapterprovides information on switches and cabling in a redundant configuration.

Automatic Failover/Manual Takeover

Process control can be transferred automatically (Failover), or you canmanually command takeover. Automatic Failover can only occur from theprimary DPU to the secondary DPU; a secondary DPU will never auto-matically failover to a primary unless the secondary loses power or is reset.

Automatic Failover

Process control is automatically transferred from the primary DPU to thesecondary DPU when the primary DPU experiences a severe diagnostic alarmor when communication between primary and secondary DPU is lost.However, if the secondary DPU is itself experiencing a severe diagnosticalarm, it will refuse control, unless the primary DPU loses power or is reset.

After the alarm condition in the primary DPU is rectified, acknowledge allremote alarms, confirm configuration using Interaction Page 9, and press thetakeover button on the front panel of the primary DPU to return control.

Manual Takeover

To manually command either DPU to assume control, press the takeover buttonon the front panel of the unit. Manual takeover will occur even if a severediagnostic alarm or a fatal alarm condition exists in the DPU whose button ispressed.

If you manually transfer to primary while the primary has a severe diagnostic



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alarm, automatic failover may cause control to transfer back to the secondarywhen you release the Takeover button, as described above.

Cable Disconnect

The backup serial link cable (Part number 081387) carries data signals betweenthe primary and secondary DPUs, as well as a status signal which determineswhich DPU is active. If one end of this cable is removed from either DPU, thatunit is rendered inactive.

If a DPU is not part of a backup pair, a terminator (Part number 081388) mustbe inserted in place of the cable.


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Chapter 6

Starting the DPU

Startup StatesRefer to this chapter to learn how to:

• Start a standalone DPU• Start DPUs in a backup pair• Replace a DPU in a backup pair

When a DPU is restarted, it senses the type of initialization being performedand starts in one of the following two modes:

Cold A Cold initialization occurs following a power outage if noconfiguration information is available from before the outage. Thiscan occur if no battery power is available when the DPU is powereddown, or if a Cold start is demanded through the front panel modeswitches. Following a Cold start, the DPU will remain in Offlinestate until it is manually placed online. Refer to "Demanding a ColdStartup."

Cool A Cool initialization occurs if configuration data is available inflash memory, unless a Cold start is demanded through the frontpanel mode switches. Following a Cool start, the DPU willautomatically progress to Online state unless its keyswitch is in theOffline position.

In both modes, the DPU uses the time and date preserved in its CMOS clock,then synchronizes with other stations on the data highway. If the CMOS clockis not valid, the DPU will raise an alarm and remain Offline until it receivestime via the data highway.

When the DPU is reset or the 24 Vdc power to the DPU is interrupted, EventQueue information is lost, but the internal battery allows the configuration to bepreserved in flash memory. When the DPU restarts, it reloads its configurationand erases the flash memory to prevent the possibility of later reloading an outof date configuration.



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Demanding a Cold StartupWhen a DPU is first placed in service, or when a DPU is moved from onelocation to another, it is advisable to clear any previous configuration data thatmay remain in its flash memory. To do this, before applying power to the DPU,set front panel mode switches 1, 2, and 8 to the left, and mode switch 4 to theright. After the DPU has gone through its startup sequence as described in"Starting a Standalone DPU," be sure to set mode switch 4 back to the left toprevent future Cold startups.

Starting a Standalone DPUPerform the following steps to ensure that a DPU is completely configuredbefore it is allowed to assume control. It is important that the DPU not beplaced in the Online state until it has been fully configured.

To start a standalone DPU:

1. Turn the DPU keylock to the Offline position (fully counter-clockwise).

2. Insert a terminator (Part number 081388) in the backup link connector.

3. On the backup DIP switch at the bottom of the DPU, set the top most switchto the right (primary).

4. Set front panel mode switches 1, 2, and 8 to the left, and set mode switch 4to the right to demand a Cold startup, as described in the preceding section.

5. Verify that the NiCd battery pack is installed and plugged correctly into P10connector on the motherboard. Additionally, verify that protectiveconnectors (Part number 081389) are installed in the IOM and CPU loadconnectors.

6. Set the proper data highway address in the station number switches.

7. Position the module into the top and bottom card guides of the chassis.

8. Carefully slide the module forward, verifying that the connector pins on thesolder side of the module engage the corresponding contact guides on thechassis assembly.

9. When the contacts are engaged and resistance is felt, firmly press on thefront panel of the module front plate to make the simultaneous connectionsat the front and rear. Apply pressure to the left of the LEDs to place theforce directly in line with the printed circuit card of the module.

10. Secure module to chassis assembly with the top and bottom lock down

Starting the DPU


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screws on the front of the module.

11. Before it begins data highway communications, the DPU will initiallydisplay FF as its front panel LEDs, progress through a series of stepscounting down from 0F to 06. Once it begins communicating, a healthyDPU will display a rapidly flickering number whose value ispredominantly 07.

12. Return mode switch 4 to the left.

13. Reload the DPU using the DPU Status Display at a Graphics Processor orthe Dump/Reload mode at the Operator Station.

14 Acknowledge all alarms from the DPU and make sure that they all clear.

15. Display Interaction Page 9 of the DPU at a WorkStation. Locate theBackup? Field and type n for no; locate the Startup? Field and type y foryes.

16. Place the keyswitch in the Run or Locked mode.

Starting a Backup Pair of DPUsWhen starting a backup pair of DPUs, you must bring the primary DPU up firstand make sure it is running properly before starting the secondary. Perform thefollowing steps to ensure that an unexpected failover does not occur during thestartup process.

To start DPU backup pairs:

1. Turn both DPU keylocks to the Offline position (fully counter-clockwise).

2. Set the top most backup DIP switch appropriately for each DPU (to theright for primary, to the left for secondary).

3. Set the remaining backup switches (shared/separate I/O) appropriately asdescribed in Chapter 2,"Backup DIP Switch Settings"; make sure thecorresponding switch positions match in each DPU.

4. On each DPU, set front panel mode switches 1, 2, and 8 to the left, and setmode switch 4 to the right to demand Cold startups from each unit.

5. Verify that the NiCd battery pack is installed and plugged correctly intoP10 connector on the motherboard. Additionally, verify that protectiveconnectors (Part number 081389) are installed in the IOM and CPU loadconnectors.

6. Set the proper data highway address in the station number switches.



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7. Position each DPU into the top and bottom card guides of each chassis, butDO NOT push them in far enough to apply power to the units.

8. Connect a backup cable (Part number 081387) between the units. Note thatthe cable ends are keyed so that they can only be inserted one way.

9. For the primary, carefully slide the module forward, verifying that theconnector pins on the solder side of the module engage the correspondingcontact guides on the chassis assembly.


11. Secure module to chassis assembly with the top and bottom lock downscrews on the front of the module.



14. Reload the primary DPU using the DPU Status Display at a GraphicsProcessor or the Dump/Reload mode at an Operator Station.

15. Acknowledge all alarms from the primary DPU.

16. Display Interaction Page 9 of the DPU at a WorkStation or OperatorStation. Locate the Backup? Field and type y for yes; locate the Startup?Field and type y for yes.

17. Place the keyswitch of the primary DPU in the Run or Locked mode.

18. Insert the secondary card using the same steps as the primary.

19. Make sure the secondary starts up and begins communicating on thehighway as described above.


21. Reload the secondary DPU using the DPU Status Display at a GraphicsProcessor or the Dump/Reload mode at an Operator Station.

22. Acknowledge all alarms from the DPU pair and make sure that secondaryalarms are all clear.

23. Display Interaction Page 9 of the DPU at a WorkStation or OperatorStation. Locate the Backup? Field and type y for yes; locate the Startup?

Starting the DPU


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Field and type y for yes.

24. Make sure that the primary DPU is displaying the alarm Backup LinkTimeout to make sure there are no higher priority alarms.

25. Place the keyswitch of the secondary DPU in the Run or Locked mode.

26. Acknowledge all DPU alarms and make sure they all clear.

Replacing a DPU in a Backup PairWhen replacing a DPU in a backup pair, it is necessary to prevent the new unitfrom gaining control until it is properly configured and up to date. Perform thefollowing steps to ensure that an unexpected failover does not occur during thereplacement process.

To replace a DPU in a backup pair:

1. Make sure there are no severe outstanding alarms from the DPU which isto remain in service, then press its Takeover switch.

2. Turn the keylock of the DPU being replaced to the Offline position (fullycounter-clockwise).

3. Without disconnecting any cables, pull the DPU being replaced far enoughout of its chassis to disconnect power, then wait until all its LEDs haveturned off; this may require up to 30 seconds.

4. Disconnect the backup cable from the DPU being replaced; DO NOTdisconnect the other end of the cable from the DPU which is to remain.

5. On the new DPU, verify that the NiCd battery pack is installed andplugged correctly into P10 connector on the motherboard. Additionally,verify that protective connectors (Part number 081389) are installed in theIOM and CPU load connectors.

6. Replace the DPU with the new unit, position the new DPU into the top andbottom card guides of the chassis, but DO NOT push the new unit in farenough to apply power to it.

7. Set the backup DIP switches on the new DPU to match the unit which wasremoved.

8. Set the station number rotary switches to match the unit that was removed.

9. Set front panel mode switches 1, 2, and 8 to the left, and set mode switch 4to the right to demand a Cold startup.

10. Connect the backup cable to the new DPU. Note that the cable end is keyedso that it can only be inserted one way.



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11. Carefully slide the module forward, verifying that the connector pins onthe solder side of the module engage the corresponding contact guides onthe chassis assembly.


13. Secure module to chassis assembly with the top and bottom lock downscrews on the front of the module.



16. Reload the new DPU using the DPU Status Display at a GraphicsProcessor or the Dump/Reload mode at an Operator Station.

17. Acknowledge all alarms from the new DPU.

18. Display Interaction Page 9 of the new DPU at a WorkStation or OperatorStation. Locate the Backup? Field and type y for yes; locate the Startup?Field and type y for yes.

19. If the new DPU is the primary of the pair, make sure the secondary isdisplaying the alarm DPU Pair is Running on Secondary. If the DPU beingreplaced is the secondary, make sure the primary is displaying the alarmBackup Link Timeout. This is done to make sure that there are no higherpriority alarms.

20. Place the keyswitch of the new DPU in the Run or Locked mode.

21. If the new DPU is the primary of the pair, wait at least 10 seconds to allowits database to be updated, then press its Takeover button to give it control.

22. Acknowledge all DPU alarms and make sure they all clear.

23. If the DPU is to be shipped or put in storage, unplug the NiCd battery packfrom the P10 connector.


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Chapter 7 Using Interaction Pages

Accessing Displays

You may access Interaction Page displays 9 through 13 from the GraphicsProcessor to view information and data specifically related to the DPU. Thesespecific Interaction Pages are covered in this chapter in some detail.

To access an Interaction Page display:

1. Bring up the Datavue main menu template.

2. Click on the Interaction Page button.

Using Interaction Page 9 Display with a WorkstationUse Interaction Page 9 to display the DPU configuration data sent by a Work-Station. Refer to Figure 7-1.

Startup

The Startup? prompt appears when manual intervention is required, followinga cold startup or fatal alarm. For example, an I/O module fails and is notconfigured as an alarm-only module.

Backup Option

DPUs can be paired in a redundant configuration as described in Chapter 5. Toconfigure the backup option, enter Y in the Backup field.

Digital Input Filter Time Field

Digital Input Filter time is in milliseconds; the default is 10 milliseconds. Thisdigital filter can be used in place of, or with, the jumper enabled hardware lagfilter on the Model IOP DI modules.

Serial Ports Field



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You may connect asynchronous serial devices to serial ports 1 and 2. Theprotocols and parameters for these devices are configured here. For additionalinformation about serial links, refer to Publication 277491, DPU EmbeddedSerial Links User's Guide.

Lockout and Log Options Field

In the Lock position, you may disallow certain data highway operations fromMIS, HOST, REloads, or Screen Edits.

DPU Configuration Page Revision Date 14/OC/96Level Time 09:32:12

MODE Run Active DHW 5.0Model 530 Configuration Backup N CP 5.0 Stat Page

IOM 5.0

DIGITALFILTER TIME 10 MSEC

SERIAL I/O PORTS

Port Baud Link Type Bits/Char Stop Parity XON/OFF RTS/CTSNo Rate (0-255) (5,6,7,8) (1,2) (O,E,N) IN OUT IN OUT

J6 9600 25 MODB 8 1 O N N N NJ7 9600 214 UMAX 8 2 N N N N N

LOCK OUT ACTIONS MIS N HOST? RELOAD? SCREENS? NLOG EDIT ACTIONS MIS N HOST? RELOAD? SCREENS? N

Figure 7-1. Interaction Page 9 Display with Sample Configuration.

Using Interaction Page 9 Display with an Operator StationUse Interaction Page 9 to configure the DPU if a Model 585 Operator Station isbeing used instead of a Workstation. Refer to Figure 7-2.

Before you can edit configuration data on Interaction Page 9, you must placethe DPU in offline mode. While you may make entries on this page only inOffline mode, they do not take effect until either Run or Locked mode isentered.

Using Interaction Pages


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Any questionable entries on this page are automatically highlighted in red. Forexample, you entered a Z instead of an I or O for a DIO module. TheInteraction Page 9 section title, where the questionable entry was made, alsobecomes highlighted.

HWY 1 STA 33 INTERACTION PAGE 9

DPU Configuration Page Revision Date 14/OC/96Level Time 09:32:12

MODE Run Active DHW 5.0Model 585 ConfigurationBackup? N CP 5.0 Stat Page 10

IOM 5.0

DIO Inventory I = Input, O = Output, A = Alarm Only1 9 17 252 10 18 26 Digital3 11 19 27 Filter Time4 12 20 28 10 msec5 13 21 296 14 22 307 15 23 318 16 24

AI Inventory Address Alarm Channels Linearizationby 16 Only 1-15

QUAD1 ( 1-15) AI PAGE 14 14QUAD2 (16-30) 15 15QUAD3 (33-47) DATA PT 14 14QUAD4 (48-62) 15 15

Redundant I/O Address Ranges (R = Redundant, C = Common)

0 16 32 48 64 80 96 112 128 144 160 176 192 208 224CC C C C C C C C C C C C C C

SERIAL I/O PORTS

Port Baud Link Type Bits/Char Stop Parity XON/OFF RTS/CTSNo Rate (0-255) (5,6,7,8) (1,2) (O,E,N) IN OUT IN OUT

J6 9600 25 MODB 8 1 O N N N NJ7 9600 214 UMAX 8 2 N N N N N

LOCK OUT ACTIONS MIS? N HOST? RELOAD? SCREENS? NLOG EDIT ACTIONS MIS? N HOST? RELOAD? SCREENS? N

Figure 7-2. Interaction Page 9, Operator Station Version.

The DPU will not become active until Interaction Page 9 is completelyconfigured and the keylock switch is in the Run or Locked position.

The following sections describe the expected entries and automatic defaults onInteraction Page 9.



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Startup

The startup? prompt appears when manual intervention is required following acold startup or fatal alarm. (For example, an I/O module fails and is notconfigured as an alarm-only module.)

After Interaction Page 9 is reviewed and configured, enter Y in the entry fieldto place the DPU into operation. Ensure that the keyswitch is in the Online(Run or Locked) position.

Backup Option Field

DPUs can be paired in a redundant configuration as described in Chapter 5. Toconfigure the backup option, enter Y in the Backup field.

Stat Page Field

This field determines what is shown on Interaction Page 8. The default for thisfield, 10, places the I/O status and event queue display on page 8. Duringconfiguration this field may be changed to 11, DPU Serial Links Status; 12,DPU Highway Performance Statistics; or 13, High Speed Digital I/O TabularDisplay.

DIO Inventory Field

The Digital Input/Output (DIO) Inventory can accept 30 entries in the ranges 1to 15 and 17 to 31.

Enter I or O to indicate input/output modules.

Examples: 1 I2 O

Append an A to indicate that loss or failure of one or more of these modules isnot a fatal alarm, as would be the default. (Any fatal alarm forces the DPU toOffline mode.)

Examples: 1 I2 O3 IA4 OA

The default is all blank fields. When no module at a given address is desired,enter blanks at that location. Note that DIO modules need not be at consecutiveaddresses.

For Fast Digital Inputs, a maximum of 25 digital input boards can be used.



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Digital Input Filter Time Field

Digital Input filter time is in milliseconds; the default is 10 milliseconds. Thisdigital filter can be used in place of, or with, the jumper enabled hardware lagfilter on the Model IOP DI modules.

Analog Input Inventory Field

The Analog Input (AI) Inventory field on Interaction Page 9 contains threecolumns. Each column can accept four entries.

The first column is for the four potential high-level Al modules needed to fillthe Analog (Process) Inputs Page. Enter the base module number (divisible by16, and greater than or equal to 32).

The second column is for As to specify alarm only.

Use the third column to specify the number of channels to be scanned of the 15possible channels. This field is used when Quad PAT output modules are used.For example, if two PAT output modules, with addresses of 48 and 62, areused, quad one could be configured for address 48, with eight channelsscanned. Defaults are all blank fields.

Redundant I/O Address Ranges Field

When the Y adapter is used for a combined shared and redundant I/O bus,ranges of modules must be specified as either redundant (R), common (C), orblank if no modules reside in the specified range. For example, address 16represents address ranges 16 through 31.

Lockout and Log Options Field

In the Lock position, you may disallow certain data highway operations fromMIS, HOST, REloads, or Screen Edits.

Serial Ports Field

You may connect asynchronous serial devices to serial ports 1 and 2. Theprotocols and parameters for these devices are configured here. For additionalinformation about serial links, refer to Publication 277491, DPU EmbeddedSerial Links User's Guide.

Interaction Page 10The I/O Module Status display shows all possible addresses on the I/O bus.The status of each address (active, standby, communication problem or nomodule) is highlighted in either green, yellow, red or black.



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I/O MODULE STATUS

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1516 17 18 19 20 21 22 23 24 25 26 27 28 29 30 3132 33 34 35 36 37 38 39 40 41 42 43 44 45 46 4748 49 50 51 52 53 54 55 56 57 58 59 60 61 62 6364 65 66 67 68 69 70 71 72 73 74 75 76 77 78 7980 81 82 83 84 85 86 87 88 89 90 91 92 93 94 9596 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111112113 114 115 116 117 118 119 120 121 122 123 124 125 126 127128129 130 131 132 133 134 135 136 137 138 139 140 141 142 143144145 146 147 148 149 150 151 152 153 154 155 156 157 158 159160161 162 163 164 165 166 167 168 169 170 171 172 173 174 175176177 178 179 180 181 182 183 184 185 186 187 188 189 190 191192193 194 195 196 197 198 199 200 201 202 203 204 205 206 207208209 210 211 212 213 214 215 216 217 218 219 220 221 222 223224225 226 227 228 229 230 231 232 233 234 235 236 237 238 239240241 242 243 244 245 246 247 248 249 250 251 252 253 254 255Last Bad Module =

EVENT QUEUE POINTERS

PUT 8489F4 20 08 820230 00 16 820230 00 24 820230 0001 820230 00 09 820230 00 17 820230 00 25 820230 0002 820230 00 10 820230 00 18 820230 00 26 820230 0003 820230 00 11 820230 00 19 820230 00 27 820230 0004 820230 00 12 820230 00 20 820230 00 28 820230 0005 820230 00 13 820230 00 21 820230 00 29 820230 0006 820230 00 14 820230 00 22 820230 00 30 820230 0007 820230 00 15 820230 00 23 820230 00 31 820230 00

Figure 7-3. Interaction Page 10, I/O Module Status and Event Queue Pointers.

Green (Model IOP I/O) or blue (Field I/O) highlighting indicates that an I/Omodule is present at that address and there are no communication problemswith the module. In a redundant I/O backup configuration, the module addresscan assume this color in both the active and inactive DPUs.

Yellow highlighting indicates that the system is set up for shared I/O (twoDPUs with a common I/O string) and a module is present at that address. Themodule address is highlighted in yellow for the inactive DPU and will changeto green when the DPU assumes control.

Red highlighting indicates that some process (Data Blocks, Process Inputs,Control Blocks, or ExCEL) is trying to access a module at that address buteither no module is present or the module has a communication problem. If thecommunication problem is intermittent, the address will only be red for 4seconds after the last unsuccessful scan. In the case where only ExCEL istrying to access the module, ExCEL must access the module frequently enoughfor the error to persist.



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SERIAL PORT J6 ExCEL

OK TRANSACTIONS 0 BUFFER OVERRUNS 0CHECKSUM ERRORS 0

NO. OF DATA BLOCKS 0 FAILED TO SENDS 0NO. OF MESSAGES/SCAN 0 LINK LEVEL ERRORS 0LINK SCAN TIME (MS) 0 RETRIES 0

TIMEOUTS 0INPUT QUEUE 0 UNEXPECTED CHARACTERS 0OUTPUT QUEUE 0 LAST NAK CODE 0

SERIAL PORT J7 ExCEL

OK TRANSACTIONS 0 BUFFER OVERRUNS 0CHECKSUM ERRORS 0

NO. OF DATA BLOCKS 0 FAILED TO SENDS 0NO. OF MESSAGES/SCAN 0 LINK LEVEL ERRORS 0LINK SCAN TIME (MS) 0 RETRIES 0

TIMEOUTS 0INPUT QUEUE 0 UNEXPECTED CHARACTERS 0OUTPUT QUEUE 0 LAST NAK CODE 0

Figure 7-4. Interaction Page 11, Serial Port Status Display.

Black highlighting indicates that no I/O module is present and no process isattempting to access that address. Note that if two modules are present at thesame address, the DPU will not be able to communicate with either module andthe display will indicate that no module is present.

The Last Bad Module statistic field displays the address and time of the mostrecent unsuccessful I/O scan.

Event Queue Pointer Information

Interaction page 10 also contains Event Queue pointer information. The EventQueue is an internal DPU buffer used to store events such as Sequence ofEvents entries, process alarms, remote diagnostic alarms, time updates, andoperator edit actions. The Event Queue pointer table shows the memoryaddress (in hex) of the last event placed in the queue by the DPU (i.e., PUTXXXXXX YY), and the memory location of the last event removed from thequeue by each of the 31 possible high traffic loop stations during normaloperation (e.g., 01 XXXXXX YY). The last two digits in the field indicate howmany times the queue has wrapped around.

Since the events are constantly being removed from the queue and processedby the stations on each scan, the addresses for active dequeueing stations(WorkStations and Operator Stations) should be close to the address of theDPU PUT pointer.



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HIGHWAY PERFORMANCE STATISTICS

STATION = 36 TIME MASTER ADDRESS 36LAST SENDER OF BAD DATA 0 TIME SYNC MSGS IGNORED 0

TOKEN PASSES PER SECOND= 2 COMMAND RESPONSE REJECTS 9MASTERSHIPS RECEIVED = 26273 LAST REJECTED STATION 30STATUS BROADCASTS = 65 LAST REJECTED QUERY 25TOTAL Q/R TRANSACTIONS = 1815 LAST REJECTED PTID TYPE FFRECEIVED FRAMES WITH ERROR 101 LAST REJECTED PTID INDEX FFUNFINISHED TRANSMIT QUERIES 0 LAST REJECTED ITEM FF

LINK REJECTS 0CRC ERRORS = 2304 READ SINGLE ITEM 152STALLOUT RECOVERIES = 0 WRITE SINGLE ITEM 181OVERRUN ERRORS = 9 READ MULT ITEMS IEEE 2RECEIVE FRAME LENGTH ERRORS= 0 WRITE MULT ITEMS IEEE 243ABORTS RECEIVED = 0 READ THESE ITEMS 34ABORTS TRANSMITTED = 0 READ SINGLE ITEM/STS 39CTS LOST = 0 WRITE THESE ITEMS IEEE 0DCD LOST = 90 READ THESE ITEMS/QUALITY 0CTS NOT ACTIVE = 0 OLD SCAN TABLE MESSAGES 0DCD ACTIVE AT TX TIME = 2 NEW SCAN TABLE MESSAGESMESSAGE RETRIES = 160UNEXPLAINED ERRORS = 0 HEX MEMORY DUMP 000000TOTAL DHW DIAGNOSTIC ALARMS= 0CW OPTICAL CABLE CHANGES = 0 D7 01 F4 IF F8 FF 2E 94CCW OPTICAL CABLE CHANGES= 0 77 04 00 50 00 00 00 00CW ELECTRICAL CABLE CHANGES 0CCW ELECTRICAL CABLE CHANGES= 2PERMANENT NEXT STATION ADDRESS = 48

Figure 7-5. Interaction Page 12, Highway Performance Statistics Page.

Interaction Page 11Interaction page 11 contains serial link statistics for PLC links and HCI linksthat may be connected to the serial ports of the DPU. Refer to Figure 7-4.These statistics are cleared during any offline to online transition. Refer toPublication 277491, DPU Embedded Links User's Guide, for more informationabout these statistics. Refer to the following table for a description of HCI linkfiles.

OK TRANSACTIONS Count of successful query/response trans-actions between the PC and DPU.

BUFFER OVERRUNS Count of messages received from PC thatwere too long to be valid.

CHECKSUM ERRORS Count of queries received with checksumerrors from PC.



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FAILED TO SENDS Count of nonimmediate queries attemptedto be sent.

UNEXPECTED CHARACTERS Count of unexpected characters receivedfrom the PC.

All other statistics for HCI link are not valid.

Interaction Page 12Interaction Page 12 contains the highway performance statistics display show-ing the diagnostic counters for the network. The statistics are cumulative fromthe last RZAP command, which is initiated from the Highway Status display onthe Graphics Processor. Refer to Figure 7-5, Interaction Page 12, HighwayPerformance Statistics Page. Refer to Publication 277472 for descriptions ofeach field appearing on the left side of the display.

The following table describes the right column statistics appearing inInteraction Page 12:

COMMAND RESPONSE REJECTs Count of the Immediate queries sent tothis station that were rejected.

LAST REJECTED STATION Highway address (in decimal) of thelast station that issued an Immediatequery that was rejected.

LAST REJECTED QUERY Immediate query type (in decimal) ofthe last Immediate query that wasrejected.

LAST REJECTED PTID TYPE PTID type field (in hex) of the lastdatabase access failure. If the rejectedquery above does not use a PTID thetype displayed will be FF.

LAST REJECTED PTID index PTID slot/channel field (in hex) of thelast database access failure. If therejected query above does not use aPTID the index displayed will be FF.

LAST REJECTED ITEM Item number (in hex) of the lastdatabase access failure. If the rejectedquery above does not use an itemnumber field the item displayed willbe FF.

READ SINGLE ITEM Count of read single item queriesprocessed by this DPU since reset.



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WRITE SINGLE ITEM Count of write single item and writesingle item IEEE queries processed bythis DPU since reset.

READ MULT ITEMS IEEE Count of read multiple items queriesprocessed by this DPU since reset.

WRITE MULT ITEMS IEEE Count of write multiple items queriesprocessed by this DPU since reset.

READ THESE ITEMS Count of read these items and readthese items IEEE queries processed bythis DPU since reset.

READ SINGLE ITEM/STS Count of read single with statusqueries processed by this DPU sincereset. The read single item with statusquery is normally issued by otherDPUs and Model 552 controllers toperform Control Block and DataBlock Receives.

Interaction Page 13Interaction Page 13 contains the DIO tabular display; the fields are describedbelow:

Table 7-1. DIO Tabular Display.

TB01-TB32 Logical name of Fast DIO board 1-32.

T/F Bit value: T = true = 1, F = False = 0.

For each bit in automatic mode, its state (T/F) is shown on ayellow or green field background. For each bit in manualmode, its state is shown on a black background.

I/O address Physical I/O bus address of TBxx. This value can be 0-239 (0= phantom).

Module type DIO I/O module type input (IN) or output (OUT).

Table 7-1. DIO Tabular Display (Continued).

For modules configured to only alarm on failure, the type (IN or OUT)will be in black on a yellow or green field background. If the



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module is configured for a fatal error on failure (DPU goesoffline), the type will be shown in yellow or green on a blackfield background.

DIGITAL TABULAR DISPLAYMODULE I/O

TYPE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ADDRESS

TBOL IN F F F F F F F F F F F F F F F F TBOI 1TBO2 OUT F F F F F F F F F F F F F F F F TBO2 2TBO3 F F F F F F F F F F F F F F F F TBO3 0TBO4 OUT F F F F F F F F F F F F F F F F TBO4 4TBO5 F F F F F F F F F F F F F F F F TBO5 0TBO6 F F F F F F F F F F F F F F F F TBO6 0TBO7 F F F F F F F F F F F F F F F F TBO7 0TBO8 F F F F F F F F F F F F F F F F TBO8 0TBO9 F F F F F F F F F F F F F F F F TBO9 0TBLO F F F F F F F F F F F F F F F F TBIO 0TBLI F F F F F F F F F F F F F F F F TBll 0TB12 F F F F F F F F F F F F F F F F TB12 0TB13 F F F F F F F F F F F F F F F F TB13 0TB14 F F F F F F F F F F F F F F F F TB14 0TB15 F F F F F F F F F F F F F F F F TB15 0TB16 F F F F F F F F F F F F F F F F TBI6 0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16TB17 F F F F F F F F F F F F F F F F F TBI7 0TB18 F F F F F F F F F F F F F F F F F TB18 0TB19 F F F F F F F F F F F F F F F F F TB19 0TB20 F F F F F F F F F F F F F F F F F TB20 0TB21 F F F F F F F F F F F F F F F F F TB21 0TB22 F F F F F F F F F F F F F F F F F TB22 0TB23 F F F F F F F F F F F F F F F F F TB23 0TB24 F F F F F F F F F F F F F F F F F TB24 0TB25 F F F F F F F F F F F F F F F F F TB25 0TB26 F F F F F F F F F F F F F F F F F TB26 0TB27 F F F F F F F F F F F F F F F F F TB27 0TB28 F F F F F F F F F F F F F F F F F TB28 0TB29 F F F F F F F F F F F F F F F F F TB29 0TB30 F F F F F F F F F F F F F F F F F TB30 0TB31 F F F F F F F F F F F F F F F F F TB31 0TB32 F F F F F F F F F F F F F F F F F TB32 0

Figure 7-6. Interaction Page 13, Digital Tabular Display.


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Chapter 8 Alarms and Diagnostics

Annunciation of Alarms

Diagnostic alarms originating at a DPU are posted as remote alarms on theWorkStation Alarm List. Refer to Publication 277509, Alarm MessageReference Guide, for a description of these alarms. DPU front panel LEDs alsoindicate certain fatal diagnostic alarms.

Front Panel Numeric LEDs

During normal operation, the numeric LEDs reflect the activity of the DataHighway Card). If a DPU is reset, it initially displays 88; during its restartcycle, it displays FF, progresses through a series of steps counting down from0F to 06, then goes online. Once online, a healthy DPU typically displays arapidly flickering number whose value is predominantly 07. If a DPU isdisconnected from the data highway, it displays a steady value of 07.

If a DPU has a failure which prevents the Data Highway Card from workingproperly, the DPU will drop off the data highway. Front panel LEDs will thenbe used to display two diagnostic codes alternating every 1.5 seconds, onereflecting the condition detected by the Data Highway Card, and the otherreflecting the highest priority alarm reported by any of the processors. TheData Highway Card reports the following detected conditions:

DA The highway address set on the front-panel rotary switches is illegal(e.g., 00).

DC Jabberhalt timeout; the Data Highway Card transmitted on thehighway too long.

DF The Data Highway Card either detected a stack imbalance or executedan illegal instruction.

The alarm code alternating with one of the above Data Highway Card codesmay be any of the alarm codes listed in the Alarm Message Reference Guide. Inmost cases, the two codes are independent; in a few special cases, one may bethe cause of the other. The most likely of those special cases is DC (jabberhalt)combined with one of the following:

F0 The Data Highway Card waited for a response from the ControlProcessor (CP) which was never received, and the CP reported no



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other fatal alarm condition.

FD The Data Highway Card waited for a response from the CP which wasnever received because the CP determined that its program code hadbeen corrupted (checksum error).

FE The Data Highway Card waited for a response from the CP which wasnever received because the CP re-executed its startup codeunexpectedly (jump or return to address 0).

Model PDP DPU Installation, Preparation and...

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