Super-small Programmable Logic Controllerwith Built-in Display
Visual KV SeriesAdvancedProgramming Course
ContentsVOL.1 Counting total number of products ...................................................................... 4
Example: Totaling the number of products on multiple production lines
VOL.2 Shift register ........................................................................................................... 6
Example: Ejecting rejects
VOL.3 BCD data output (to BCD display) ........................................................................ 8
Example: Indicating the number of products
VOL.4 Setting of multi-level output with high-speed counter ..................................... 10
Example: Cutting a sheet of cloth to specified length
VOL.5 BCD data input (4 digits) ..................................................................................... 12
Example: Inputting BCD data with a digital switch
VOL.6 BCD data input (2 digits) ..................................................................................... 14
Example: Inputting BCD data from the digital switch
VOL.7 Measurement of high-speed pulse period ......................................................... 16
Example: Checking rotation pulse period of engine
VOL.8 Phase differential input ........................................................................................ 18
Example: Input from rotary encoder
VOL.9 Position control using a stepping motor ........................................................... 20
Example: Stop/counterclockwise rotation of a stepping motor at a specified number of pulses
VOL.10 The specified frequency pulse output function ................................................. 22
Example: Speed control of a pulse motor with the specified frequency pulse output function
VOL.11 Word shifting ......................................................................................................... 24
Example: Storing the stop duration of equipment in memory as history
VOL.12 Fine adjustment with a digital trimmer ............................................................... 26
Example: Fine adjustment of the air discharge time of a parts feeder
VOL.13 Receiving multiple pulses and outputting them as a batch ............................. 28
Example: Displaying total number of products travelling on multiple lines on a counter
VOL.14 Converting high speed pulses into low speed pulses ...................................... 30
Example: Converting pulse frequency
VOL.15 Bit counting (Bit checking) .................................................................................. 32
Example: Checking how many error detection signals are input to input relays of channel
2
3
VOL.16 Shift register simulation in an asynchronous production line ......................... 34
Example: Ejecting rejects without a constant synchronous signal
VOL.17 Emergency stop circuit ........................................................................................ 36
Example: Emergency stop for cutting work
VOL.18 Selection of operation mode ............................................................................... 38
Example: Selecting fully-automatic or individual operation mode
VOL.19 Step-progress operation (sequential control) ................................................... 40
Example: Step progress of material handling machine
VOL.20 Frequency counter function ................................................................................ 42
Example: Counting the number of rotations using the frequency counter
VOL.21 Sorting ................................................................................................................... 44
Example: Sorting machines in the ascending order of production
VOL.22 High-speed interrupt input function ................................................................... 46
Example: Measurement of passing time between two points using high-speed interrupt input
VOL.23 Synchronous control function ............................................................................ 48
Example: Synchronous control of a pulse motor
VOL.24 High-speed counter .............................................................................................. 50
Example: Multi-step comparator operation with high-speed counter
VOL.Example
4
Counting total number of products1Totaling the number of products on multiple production lines
Line 1
Line 2
Line 3
Line 4
Line 5
The number of products travelling on each of 5 lines iscounted simultaneously. When the total number of productson the 5 lines reaches 100 the KV outputs.An FS Series fiberoptic sensor counts the number ofproducts on each line. When the total number equals thepreset value, the KV outputs.
Input 0000: Counting products on line 1Input 0001: Counting products on line 2Input relay 0002: Counting products on line 3Input relay 0003: Counting products on line 4Input relay 0004: Counting products on line 5Input relay 0005: Resetting
0000
0001
0002
0003
0004
0 1 2 3 4 5 6 7, 8Products counted
■ Programming TechniqueThe following 2 instructions can be used for counting.
(1) Counter instruction(2) Increment Memory instruction
The programs created using instruction (1) and (2) are as follows:
Using instruction (1) Using instruction (2)
For the same control as shown here, using instruction (2) simplifies programming.
Time and labor for debugging is saved.
To obtain comparator output, the CMP instruction can be used.
C001LDA
DM0001STA
C002LDA
DM0002STA
C003LDA
DM0003STA
C004LDA
DM0004STA
C005LDA
#09999C005
#09999C004
#09999C003
#09999C002
#09999C001
DM0005STA
DM0005ADD
DM0000STA
DM0003ADD
DM0004ADD
DM0001LDA
DM0002ADD
0005
2002
DM0000INC
DM0000INC
DM0000INC
DM0000INC
DM0000INC
0004
0003
0002
0001
0000
0000
0001
0002
0003
0004
0005 $0000DW
DM0000
Visual KV Series
Outline
FS Series Fiberoptic Sensor
Output relay 0500: Comparator output
5
VOL. 1 Counting total number of products
Programming Example
0000
0001
0002
0003
0004
0005
2002
0001
0002
0003
0004
0005
0006
0007
0008
0009
END
ENDH
DM0000INC
DM0000INC
DM0000INC
DM0000INC
DM0000INC
$0000DW
DM00002009#00100
CMPDM0000
LDA0500
When Input 0000 (line 1) turns ON, DM0000 isincremented by 1.
When Input 0001 (line 2) turns ON, DM0000 isincremented by 1.
When input relay 0002 (line 3) turns ON, DM0000 isincremented by 1.
When input relay 0003 (line 4) turns ON, DM0000 isincremented by 1.
When input relay 0004 (line 5) turns ON, DM0000 isincremented by 1.
When input relay 0005 (reset input) turns ON, DM0000 isreset to 0.
When DM0000 equals 100 or more, output relay 500 turnsON.When the reset input (0005) turns ON, output 0500 turnsOFF.
0000
0001
0002
0003
0004
0000
0001
0002
0003
0004
DM0000INC
DM0000INC
DM0000INC
DM0000INC
DM0000INC
DM0000INC
(2)(1)
Tips ORing Differentiation instructions• Compare the following 2 programs.
In program (1), counting is performed for each input even when input relays 0000 to 0004turn ON simultaneously.In program (2), simultaneous inputs are ignored when input relays 0000 to 0004 turn ONsimultaneously.
Referring to the above, program according to your purpose.
Set the input time constant to 10 µs using HSP instruction when the line speed is very high.
VOL.Example
6
2 Shift registerEjecting rejects
Detecting rejectsSensor Input 0001
Position 1 Position 2 Position 3 Position 4 Position 5
Compressed air ejection0500
Clock inputSensor Input 0002
CamDetection position Ejection position
■ Programming TechniqueThe SHIFT instruction allows the sensor reject input to turn ON each specified internal utility relay sequentially.Each utility relay turns ON synchronously when the reject reaches a specific stage on the conveyor. This reject willbe ejected from the conveyor when the eject output and final utility relay turn ON.
Each time the clock input sensor is activated, a workpiece travels from position 1 to 5 sequentially. Acceptance orrejection values for the workpieces in position 1 to 5 are stored in internal relays 1000 to 1004, with a reject beingejected, using compressed air, in position 5.
0002
0000
0500
1000
1001
1002
1003
1004
Position 5Position 4Position 3Position 2Position 1
(Clock input)
1 sec
Position of reject
(Ejection output)
(Detection of rejects)
Outline
At position 1, the fiberoptic sensor checks whether the workpiece is acceptable or not. If the workpiece is rejected,it is ejected at position 5.When the detection position is different from the ejection position as shown in the figure, using the Shift instructionis convenient.
7
VOL. 2 Shift register
Programming Example0001 1100
2003
0002
2003
1004 0002
0500
1000SET
1100DIFU
SFT
D 1000
CLK
1004RES
#00010T000
T0000006
0005
0004
0003
0002
0001
0500
Internal Input relay 1000 is turned ON by a signal fromthe fiberoptic sensor when it detects a reject.
Each time clock input relay 0002 turns ON, acceptanceor rejection of workpieces in position 1 to 5 is stored ininternal relays 1000 to 1004.
SFTD 1000
CLK
1004RES
0001
0002
20031000
1001
1002
0002
0001(1)
(Detection of rejects)
(Clock input)
SFTD 1000
CLK
1004RES
0001 1100
2003
0002
2003
1000
1001
1002
0002
00011000SET
1100DIFU
(2)
Then, program as follows:
A one-shot ejection signal is sent.
Tips Using shift registerThere are 2 ways to input data into the shift register:
In circuit 1 shown above, reject detection signals cannot be transferred to the internal registerif the reject detection output relay is not turned ON while the clock input pulse is ON (if theyare not synchronized).
In circuit 2 shown above, the reject detection signal is guaranteed to be sent to the internalregister.
➮ For details, refer to the KV User’s Manual.
VOL.Example
8
BCD data output (to BCD display)Indicating the number of products
The number of products is counted by the internal counter of the KV, and the number is indicated on the BCDdisplay.
Without using an externally-mounted counter, the internal counter of the KV can indicate the count result on theexternal BCD display. This enables centralized control of the system by the KV.
■ Programming Technique1. TBCD instruction: In the KV, data is in binary format to convert binary data into BCD data.
2. STA instruction: Use this instruction to transfer BCD data obtained by the TBCD instruction to external equip-ment.
4-digit BCD display connection diagram and programming example are shown below.
Type I: 4-digit individual input
Connect the output of the KV to each input of the 4 digits of the BCD display.
Programming Example (Using the KV-40)
Though 16 outputs from the KV are required, program length can be decreased.
BCD displayVisual KV Series
Count inputPZ2 Series
1 2 4 8 1 2 4 8 1 2 4 8 1 2 4 8
4th-digit BCD data(512 to 515)
1st digit
1st-digit BCD data(500 to 503)
2nd-digit BCD data(504 to 507)
2nd digit
3rd-digit BCD data(508 to 511)
3rd digit4th digit
2002
C0000001
0002
00000500STA
C000LDA TBCD
#00100C000 Counter (count input: 0000, preset value: 100)
The value of the internal counter is converted into BCD data and isoutput to the display.
3
Outline
9
Type II: Digit designation input
Data of 1st to 4th digits is indicated sequentially in a high speed cycle.
Programming Example (The ladder program may vary depending on the KV model to be used.)
Though longer programming is required, only 8 outputs from the KV are required.
The KV-D20 Operator Interface Panel is convenient for displaying several values.
VOL. 3 BCD data output (to BCD display)
1 2 4 8
BCD data of each digit(0500 to 0503)
4th digit 3rd digit 2nd digit 1st digit
1st digit2nd digit3rd digit4th digit
Each-digit designation(0504 to 0507)
0001
0002
2008
C000
T001
2003
T001
2003
1008
1000
1002
1004
1006
1001
1003
1005
1007
0003
0004
0005
0006
0007
0008
0009
0010
0011
0012
0013
0014
0015
0500STA
DM0000STATBCD
C000LDA
DM0000LDA
DM0000LDA
DM0000LDA
#04SRA
#08SRA
#12SRA
0500STA
0500STA
0500STA
0504
0505
0506
0507
$000FANDA
$000FANDA
$000FANDA
$000FANDA
SFTD 1000
CLK
1008RES
1000SET
1000SET
#00100C0000000
#00050 001ST
7 6 5 4 3 2 1 0
The start relay of the Shift instruction is turned ON when operationbegins.
Counter (count input: 0000, preset value: 100)
50-ms clock pulses are output. (Display updating)
Internal relays 1000 to 1008 are turned ON sequentially.(BCD display updating)
Internal relays 1000 to 1008 are sequential and repeatedly turnedON/OFF.
Units digit data in the internal register is output through 0500.
Tens digit in the internal register is output through 0500.
Hundreds digit data in the internal register is output through 0500.
Thousands digit data in the internal register is output through 0500.
Digit designation of 1st digit (units digit) is output through 0504.
Digit designation of 2nd digit (tens digit) is output through 0505.
Digit designation of 3rd digit (hundreds digit) is output through 0506.
Digit designation of 4th digit (thousands digit) is output through 0507.
VOL.Example
10
Setting of multi-level output withhigh-speed counterCutting a sheet of cloth to specified length
4
Winding process
■ Programming TechniqueFor this control, 3 values (the number of pulses) must be preset respectively to decrease winding speed, stopwinding, and alarm overrunning. Preset the number of pulses of the high-speed counter to 3 levels using the CMPinstruction.
➮ For details on the instructions, refer to the KV Users Manual.
Cutter
Rotary encoder
Decrease inwinding speed
Input the preset value for each point.
AlarmOverrunning
Cutting
Stop ofwinding
Start of winding
20092002
2009
DM0000CMP
CTH0LDA
DM0001CMP
0500
0501
0502DM0002CMP
2009Alarm for overrunning
Signal for decreasing winding speed
Signal for stopping winding
Outline
By using pulses fed from the encoder, the KV controls winding speed of a sheet of cloth to cut the cloth to thespecified length.High speed pulses from the encoder are entered to the high-speed counter of the KV. Output signals are issuedrespectively to decrease winding speed, to stop winding and for overrunning alarm, the preset values (the numberof pulses) are previously input into the data memory of the KV.
11
VOL. 4 Setting of multi-level output with high-speed counter
0001
0002
0003
0004
0005
0006
0007
0008
2008
2002
0001
2002
HSP
HSP
CTH0
2009
2009
2009
0500
0501
0502
#02000DW
DM0002
#01500DW
DM0001
#01000DW
DM0000
2113SET
0004
0006
0004
2114RES
DM0000CMP
CTH0LDA
DM0001CMP
DM0002CMP
2002
2002
2002
2009
2009
2009 0502
0501
0500
CTH0LDA
DM0000CMP
DM0000CMP
DM0002CMP
2002 CTH0LDA
DM0000CMP
05002009
DM0001CMP
05012009
DM0002CMP
05022009
There are a large number of lines,making it difficult to understand the flow.
There are few lines, making it easier tounderstand the flow.
Programming Example
20092009
When the power is turned ON, preset the initial values for decelera-tion point, stop point, and overrunning point respectively to 1000,1500, and 2000.
When the number of pulses from the encoder exceeds the presetvalue for overrunning point in DM0002, output is sent through outputrelay 0502.
When the number of pulses from the encoder exceeds the preset valuefor stop point in DM0001, output is sent through output relay 0501.
When the number of pulses from the encoder exceeds the presetvalue for the deceleration point in DM0000, output is sent throughoutput relay 0500.
The pulses from the encoder are received with high-speed counterCTH0 through inputs 0004 and 0006.
The input time constants of inputs 0004 and 0006 are changed to10 µs.
CTH0 is set to the double multiplication mode.
CMP instruction1. To obtain comparator output using the CMP instruction, create an expanded ladder
diagram program. This makes it easier to understand sequential processing flow.
Conventional ladder diagram Expanded ladder diagram
2. When or is used as compar ison condition:
When the value in the internal register is smaller than the operand value, internal relay2009 turns ON. By applying this, program as , the desired condition(value in the internal register oper and value) can be set.
* The same process can be used for comparison condition .
Tips
Fromencoder
VOL.Example
12
BCD data input (4 digits)5Inputting BCD data with a digital switch
The preset value for the KVs counter is input using an external digital switch.
■ Programming Technique
To input 4-digit BCD data, it is convenient to use the HKEY instruction.
Advantage: To input 4-digit BCD data, 16 input terminals are normally required. With the HKEY instruction,however, only 4 inputs and 4 outputs are required.
4-digit BCD data is stored in special utility relays 2900 to 2915.
Example of utility relay status: When the BCD data is 1234:
1
–
+
2
–
+
3
–
+
4
–
+
4-digit BCD digital switch Visual KV Series
COM 0000 0001 0002 0003 0004 0005 0006 0007 0008 0009 0010 0011 0012 0013 0014 0015
100 101 102 103
DC24V
+–
DC24V
+–
COM 0000 0001 0002 0003
COM 0500 0501 0502 0503
100 101 102 103
Digitalswitch
Digitalswitch
24 V DC
24 V DC
2 9 1 5 2 9 1 4 2 9 1 3 2 9 1 2 2 9 1 1 2 9 1 0 2 9 0 9 2 9 0 8 2 9 0 7 2 9 0 6 2 9 0 5 2 9 0 4 2 9 0 3 2 9 0 2 2 9 0 1 2 9 0 0
0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0
“1”
103
“2”
102
“3”
101
“4”
100
Outline
Diode
13
Programming ExampleTo set the preset value of counter C000 using a 4-digit digital switch:
0001
0002
0003
HKEY
C000
0005
2815 2900LDA
C000STATBIN
00000500
#09999
0004C000 Input to counter C000 is received through input
0004.
When input 0005 is turned ON, the preset value ofthe digital switch is determined.
4-digit BCD data from the digital switch is readfrom special utility relays 2900 to 2915, andconverted into a binary number, which is used asthe preset value of counter C000.
VOL. 5 BCD data input (4 digits)
If the HKEY instruction is not used, the above programming example is written in ladderdiagram notation as follows. You soon discover how simple programming can be using HKEY.
The time constant is set to 10 µs using the HSPinstruction, and data is received through inputs0000 to 0003.
2002
2003
T001
0005 1000
T001
2003
1001
1003
1005
1007
0500
0501
0502
0503
1009
C000
0503
0502
0501
0500
SFTD 1001
CLK
1009RES
1001SET
#00020 001ST
HSP0000
HSP0001
HSP0002
HSP0003
1000DIFU
$000FANDA
$000FANDA
$000FANDA
$000FANDA
DM0004ORA
0000LDA
0000LDA
0000LDA
0000LDA
DM0003ORA
DM0002ORA
DM0001LDA
#04SLA
DM0001STA
DM0002STA
#08SLA
DM0003STA
#12SLA
DM0004STA
TBINC000STA
#09999C0000004
Obtaining the preset value from the digital switchWhen 0500 is ON: Receiving 100 data to store inDM0000When 0501 is ON: Receiving 101 data to store inDM0001When 0502 is ON: Receiving 102 data to store inDM0002When 0503 is ON: Receiving 103 data to store inDM0003
Combine each digit and convert the result intobinary data. This data is used as the preset valueof the counter.
Output relays 0500 to 0503 are turned ONsequentially and the equivalent data for each digitis sent to the special utility relays.
Tips
Using the HKEY instruction shortens programming to only 3 lines.
VOL.Example
14
BCD data input (2 digits)6 Inputting BCD data from the digital switch
The product type No. is input to the KV using the external digital switch. At this time, the ANDA instruction ignoresinput data from the operation switch or sensor.
■ Programming Technique
To input 2-digit BCD data, it is convenient to use the LDA instruction.
When 2-digit BCD data is entered to inputs 0000 to 0007 of the KV-40 Series:
When the LDA instruction is used, the ON/OFF status of inputs 0000 to 0015 are received normally. When sensorsor operation switches are connected to inputs 0008 to 0015, therefore, their ON/OFF status is entered as BCDdata.Use the ANDA instruction to ignore the ON/OFF status of inputs 0008 to 0015.
As shown above, only 2-digit BCD data can be received, regardless of whether these sensors or operation switchesturn ON/OF.
3
–
+
4
–
+
2-digit BCD digital switch Visual KV Series
COM 0000 0001 0002 0003 0004 0005 0006 0007 0008 0009 0010 0011 0012
100 101
DC24V
+
–
Operation switch, sensor, etc.Digitalswitch
24 V DC
0015 0014 0013 0012 0011 0010 0009 0008 0007 0006 0005 0004 0003 0002 0001 0000
0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0
0015 0014 0013 0012 0011 0010 0009 0008 0007 0006 0005 0004 0003 0002 0001 0000
0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
0015 0014 0013 0012 0011 0010 0009 0008 0007 0006 0005 0004 0003 0002 0001 0000
0 1 1 0 0 1 0 1 0 0 1 1 0 1 0 0
$OOFFANDA
Input
BCD data “4”BCD data “3”BCD data “0”BCD data “0”
BCD data “4”BCD data “3”ON/OFF status of sensor or operation switch
Outline
15
Programming Example2002 0000 $00FF
LDADM0000
STAANDA0001The ON/OFF status of inputs 0000 to 0015 is received,but only the data from inputs 0000 to 0007 is selectedand entered into data memory DM0000.
2002 $0FFF
2002 0000 $000FLDA
DM0000STAANDA
0000LDA
DM0000STAANDA
Input0 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8
– – – – 0 0 1 1
0 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1
0 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
Internal register#04SLA
$000FANDA
0 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0
(*1)
(*2) 0 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
0 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0
0 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0010 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0
0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0
DM0002ORA
Tens digit of BCD data
VOL. 6 BCD data input (2 digits)
1. ANDA instructionIn the above programming example, $00FF is specified as the operand for the ANDAinstruction to ignore the ON/OFF status of inputs 0008 to 0015.Referring to the above programming, specify the operand as follows to receive 1-digit dataor 3-digit data.
2. 2-digit BCD dataExample: When inputs 0004 to 0007 cannot be used because the high-speed counter of
the KV-40 is used, receive 2-digit BCD data through inputs 0000 to 0003 and0008 to 0011. At this time, use the SLA instruction and ORA instruction conven-iently.
In (*1) and (*2) shown above, contents in the internal register are changed as follows:
Tips
To receive 1-digit BCD data:
To receive 3-digit BCD data:
2002 #04SLA
DM0001STA
0008LDA
$000FANDA
DM0002TBINORA
0000 $000F DM0002STAANDA
DM0000STA
LDA
DM0001LDA
(*2)
(*1)
COM 0000 0001 0002 0003 0004 0005 0008 0009 0010 0011
100 101
24 V DC+
–
3
–
+
4
–
+Digital switch
Set value = 34
Used for high-speed counter.
Tens and units digits are stored in DM0000.
Units digit of BCD data is stored in DM0002.
Tens digit of BCD data is stored in DM0001.
VOL.Example
16
Measurement of high-speed pulseperiod7Checking rotation pulse period of engine
The sensor detects the mark on the jig for the engine and emits a pulse each rotation. Using these pulses, thepulse period during engine rotation at high speed is measured.
■ Programming Technique
Step 1: The rotation pulse period is obtained by counting the number of internal clockpulses emitted by the KV.
To obtain the rotation pulse period, internal clock pulses (example: 100µs period) emitted during each rotation pulseperiod are counted using the high-speed counter.
Step 2: Use the INT instruction for programming the first step operation.Rotation pulses are received by the KV through input 0003, and the pulse period is measured using the Interruptinstruction.
When an interrupt is executed, the current value of the high-speed counter is automatically transferred to the datamemory (DM1934) at the rising edge of the pulse received at input 0003.
When this function is used, the clock pulse count equals the difference between the value of the high-speed coun-ter obtained at the rising edge of the first rotation pulse and that of the second rotation pulse.
FS Series
Visual KV Series
Rotation pulse period = internal clock pulse period: 100 µs x clock pulse count
Internal clock pulse count
Rotation pulse
Internal clockpulse (100 µs)
INT
0003
Clock pulse count = DM1934 (2) - DM1934 (1)
DM1934(1) DM1934(2)
Pulse period
Rotation pulse
Internal clockpulse (100 µs)
Outline
Pulse period
17
VOL. 7 Measurement of high-speed pulse period
Programming Example
Note: Since the countable range of CTH1 is 00000 to 65535 in the above program example, measurablerotation pulse period is between approx. 100 µs and approx. 6553 ms.
An interrupt is declared, and initialization isperformed. The interrupt polarity of input0003 is set to the rising edge.
2008
2002
2002
2002
2002
2002
2412RES
1000RES
2413RES
1000SET
1000
0006
0007
0008
0009
0010
0011
0005
0004
0003
0002
0001DM0002
STADM0000
STA2200STA
#00000LDAEI
DM0001STA
DM0000STA
DM1934LDA
#10000DIV
DM0002STA
DM0001LDA
#00100MUL
DM0001STA
DM0000SUB
DM1934LDA
CTH12202
HSP0003
END
INT0003
RETI
ENDH
The difference between the current valueof CTH1 obtained at the rising edge of thefirst rotation pulse and that obtained at therising edge of the second rotation pulse isentered into DM0001.
The rotation pulses are received using theINT instruction.
The rotation pulse period measured isentered into DM0002 in milliseconds.
Internal clock pulses (100 µs) of the KV areinput into high-speed counter CTH1, andcounted.
Input time constant for input 0003 is set to10 µs.
Higher accuracy for this measurement can be obtained by using special utility relay 2200 or2201 which enables the use of the 1 µs or 10 µs internal clock pulse of the KV. The countableranges are as follows.
• 1 µs: Approx. 1 µs to approx. 65 ms• 10 µs: Approx. 10 µs to approx. 655 ms
When the clock pulses exceeds 65535 (maximum countable value by CTH1), use CTH0.Then, up to 56 minutes (approx.) can be measured accurately.
Example:1. Count internal clock pulses (100 µs) at the rising edge of the rotation pulse using CTH0,
and set the preset value to 50.
2. When the CHT0 count exceeds 50 (preset value), a direct clock pulse (period: 10 ms) isoutput through output relay 500.
3. The rotation pulse period can be obtained by counting the number of direct clock pulsesemitted between the rising edge of the first rotation pulse and that of the second.
100 µs
10 ms
50 50 50
Direct clockpulse
Internal clockpulse (100 µs)
Rotation pulse Pulse period
Tips
VOL.Example
18
■ Programming TechniqueWhen using the phase differential input, set the high-speed counter to the double or quadruple multiplication mode.
CTH0 Phase A: Input 0004 Phase B: Input 0006CTH1 Phase A: Input 0005 Phase B: Input 0007
Special utility relay setting for phase differential input
8
Visual KV Series
Phase A
Phase B
0HTC 1HTC
3112 4112 3122 4122
edomelbuoD NO FFO NO FFO
edomelpurdauQ FFO NO FFO NO
1 2 3 4ONOFFONOFF
0 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1 0
Counter value
Phase B
Phase A
Counter value
Phase B
Phase A
Phase differential inputExample: Input from rotary encoder
Outline
Rotary encoder
ONOFFONOFF
1 2 3
3
4
4
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1 2
Phase differential input in double multiplication mode(2113: ON, 2114: OFF)
Phase differential input in quadruple multiplication mode(2113: OFF, 2114: ON)
19
Programming Example (In double multiplication mode)Pulses up to 30-kHz frequency can be input.
VOL. 8 Phase differential input
2008
2002
0000
2002
2113SET
2114RES
CTH0RES
0003
0004
0005
0002
0001
HSP0004
CTH00004
HSP0006
High-speed counter CTH0 is set to the doublemode.
Turning ON input 0000 resets high-speedcounter CTH0.
The pulses from the encoder are counted withhigh-speed counter CTH0.
The input time constants of inputs 0004 and0006 are set to 10 µs.
MEMSW$0800
MEMSW$1000
To use 24-bit high-speed counterThe 24-bit high-speed counter can be used to count the pulses from the encoder bysetting the special utility relays. It allows reliable counting of the pulses that cannot becounted with the 16-bit high-speed counter.
Setting methodSpecify the 24-bit high-speed counter with the MEMSW instruction.
To set high-speed counter CTH0 To set high-speed counter CTH1
The counter value is read at every scan and is stored in the following data memories.DM1900: Low-order bits of current CTH0 valueDM1901: High-order bits of current CTH0 valueDM1902: Low-order bits of current CTH1 valueDM1903: High-order bits of current CTH1 value
By using the KV-D20 operator interface panel, you can display the current value of the 24-bit high-speed counter in real time.
Tips
VOL.Example
20
Stop/counterclockwise rotation of a stepping motor at a specified number of pulses
■ Programming TechniqueFor positioning control, set each parameter in the specified data memory in advance.Turning on the special utility relay starts the operation. The KV Series starts ramp up/down control automatically.Pulses are output from output 0502.The output frequency can be specified within the range of 200 Hz to 50 kHz.
Parameter setting
Control relays
➮ Refer to “12.3 Positioning Control” on page 690 in the Visual KV Series User’s Manual for details.
Operating procedure
Input 0000: ON
Clockwise rotationfor 1000 pulses
Input 0001: ON
Clockwise rotationfor 2000 pulses
Input 0002: ON
Counterclockwiserotation for 3000pulses (Return to thestarting position)
➞➞
➞➞
➞ Visual KV Series
Stepping motor and motor driver
➮ For wiring, refer to “11.3 Examples of Using the Positioning ControlFunction” on page 652 in the Visual KV Series User’s Manual.
DM1481
DM1480
9 Position control using a stepping motor
Outline
Frequency (Hz)
Operating frequency
Startup frequency
Number of outputpulses (pulses)
DM1485 and DM 1484Upper digit Lower digit
Accelerationtime DM1482
Decelerationtime DM1482
yromemataD stnetnocgnitteS egnargnitteS0841MD )zH(ycneuqerfputratslortnocnwod/pu-pmaR 000,05ot0021841MD )zH(ycneuqerfgnitarepolortnocnwod/pu-pmaR )ycneuqerfputratsnahtregraleulav(000,05ot0022841MD )sm(emitnoitareleced/noitareleccalortnocnwod/pu-pmaR 0004ot04841MD )stib61rewol(sesluptuptuoforebmuN )0si5841MDnehweromro2(535,56ot05841MD )stib61reppu(sesluptuptuoforebmuN 53556ot0
.oNyalerytilitulaicepS noitpircseD8032 .noitarepospotsneht,egdegnisirtanoitarelecedsmrofreP9032 .margorptpurretninanitesergniebnehwyletaidemminoitarepospotS.tuptuoeraseslupelihwNOsniameR0132 .egdegnisirtanoitarepopustratS
21
VOL. 9 Position control using a stepping motor
Programming Example
The interrupt for emergency-stop opera-tion is enabled.
ENDH
RETI
INT
END
HSP0003
0001
0002
2008
2002
0000
0001
1002
0004
2002
0003
0004
0005
0006
0007
0008
0009
0010
0011
0012
0013
0014
0002
1000
1001
EI
2309RES
#00000DW
DM1485
#01000DW
DM1484
#00200DW
DM1482
#05000DW
DM1481
#00500DW
DM1480
0503RES
#00000DW
DM1485
#02000DW
DM1484
#00200DW
DM1482
#05000DW
DM1481
#00500DW
DM1480
0503RES
#00000DW
DM1485
#03000DW
DM1484
#00200DW
DM1482
#05000DW
DM1481
#00500DW
DM1480
0503SET
2413RES
2412RES
2310
1002
1001
1000
2308
0003
The input time constant for input 0003(emergency stop) is set to10 µs.
The parameters for clockwise rotation for1000 pulses are set.
The parameters for clockwise rotation for2000 pulses are set.
The parameters for counterclockwiserotation for 3000 pulses are set.
When each parameter is set, pulse outputis started.
The operation is slowed down andstopped.
The interrupt program for emergency stopis executed.
0004 2308
RETI
2002 2309RES
INT0003
Slow-down stop and emergency stopTurn ON relay 2308 for the slow-down stop operation.
Reset relay 2309 in the interrupt program for the emergency-stop operation.
Tips
VOL.Example
22
Speed control of a pulse motor with the specified frequency pulse output function
10
Use the specified frequency pulse output function to control the speed of a pulse motor.Turning on input 0000 starts the operation. The operation is slowed down and stopped when input 0001 turns on.The operation frequency is set in DM0000.
Applications: Tension adjustment of hoop material, Timeadjustment for sheet material remaining inthe processing bath
■ Programming TechniqueThe Visual KV Series features the specified frequency pulse output function as standard. This function is convenientespecially for the applications above. When the specified frequency pulse output function is set, the pulses of thefrequency (Hz) specified in DM1936 is produced from output 0501. Turning ON special utility relay 2306 starts thepulse output. Turning OFF special utility relay 2306 stops the pulse output.
Device used for specified frequency pulse output
Special utility relays
Data memory
Pulse duty ratio: fixed to 50%
The frequency is increased/decreased by 100 Hz and updated every 20 ms in the program.The current speed is compared with the preset speed. If the current speed is less than preset speed, the currentspeed is increased. If the current speed is more than the preset speed, the current speed is decreased.
OHZ OHZ
30kHZ
50kHZ
5kHZ
20kHZ
Visual KV Series Pulse motor and motor driver
The specified frequency pulse outputfunction
Outline
.oNyaleR noitpircseD
6032noitcnuFoN:FFO,seY:NO.tuptuoeslupycneuqerfdeificepsesU
.NOsnrut7032yalerrorrenehwFFOdecrofsi
7032.noitcnuftuptuoeslupycneuqerfdeificepsrofgalfrorrE
).FFOdenrutsituptuoeslupeht,NOdenrutnehW(
.oNMD noitpircseD6391MD )]zH:stinU[00005ot61(.nettirwsituptuoeslupycneuqerfdeificepsrofeulavteserP
ON
OFF
The ratio between ON and OFF time is 1:1.
23
VOL. 10 The specified frequency pulse output function
Programming ExampleThe operation starts when input 0000 turns ON. The operation is slowed down and stopped when input 0001turns ON. The output frequency is changed every time when input 0002 turns ON.When the output frequency (Hz) is specified in DM0000, the operation is controlled at the start-up speed of 16Hz and the acceleration of 100 Hz/20 ms.
The preset speed is set to “16” at the rising edge of input0000. The specified frequency pulse output start relay isturned ON.0001
1204
1101
0002
2003
1002
2008
1206
1200
1201
1202
1203
1100
T000 2009
2011
2307
2002
2002
ENDH
RET
SBN01
RET
SBN00
END
0000 1200SET
1101SET
1100SET
1101RES
1100RES
2306RES
2010
2306SET
1206
0500
SFTD 1200
CLK
1204RES
1002DIFU
00CALL
01CALL
1001DIFU
#00016DW
DM1936
#30000DW
DM0000#50000
DWDM0000#05000
DWDM0000#20000
DWDM0000
DM1936STA
TM02ADD
DM1936LDA
TM02STA
DM0000LDA
DM1936SUB
DM1936LDA
DM0000CMP
#00100CMP
DM1936STA
TM02SUB
DM1936LDA
DM1936STA
#00100ADD
DM1936LDA
DM1936STA
#00100SUB
DM1936LDA
TM02STA
2306 10001000DIFU
1001
1003DIFU
1003
1004DIFU
1004
1005DIFU
1005
1006DIFU
#00100CMP
1006
#00020 000ST
2011
2011
T000
2011
2011
LDA#00016 DM0000
STADM1936
CMP
DM1936LDA
DM0000SUB
The operation is slowed down and stopped at the risingedge of input 0001 or at the end of the operation pattern.When the slowdown-stop relay is turned ON, the presetspeed is set to 16 Hz. When the output frequency reaches16 Hz, the operation is stopped.
The output frequency is changed in the specified order atthe rising edge of the output frequency change input.
The 1st frequency is set. (30 kHz)
The 2nd frequency is set. (50 kHz)
The 3rd frequency is set. (5 kHz)
The 4th frequency is set. (20 kHz)
The 20-ms flicker circuit is activated during the pulseoutput.The current speed is compared with the preset speed every20 ms. The current speed is accelerated (SBN00) when thepreset speed is faster. The current speed is decelerated(SBN01) when the preset speed is slower.
Output 0500 turns ON when a setting error occurs.
Acceleration processWhen the difference between the current speed and presetspeed is less than “100,” the speed is accelerated by thedifference. When the difference is “100” or more, the speedis accelerated by “100.”
Deceleration processWhen the difference between the current speedand preset speed is less than “100,” the speedis decelerated by the difference. When thedifference is “100” or more, the speed isdecelerated by “100.”
VOL.Example
24
Word shifting11Storing the stop duration of equipment in memory as history
The stop duration of equipment is measured using the internal timer of the KV, and is stored into data memoryDM0000. When the equipment stops again, the previous stop duration is transferred to DM0001 and the currentstop duration is written into DM0000. The last 5 stop durations are stored.
Example:
When stop 1 (1 min), stop 2 (2 min and 28 sec), and stop 3 (51 sec) are input sequentially, the contents of eachdata memory is changed, as follows, each time a new stop duration is input.
■ Programming Technique
Use the FOR-NEXT instructions and indirect addressing of data memory.
Use the LDA instruction and STA instruction to shift words in the data memory. The content of each data memory istransferred as follows:
(1): Content of DM0003 is transferred to DM0004.(2): Content of DM0002 is transferred to DM0003.(3): Content of DM0001 is transferred to DM0002.(4): Content of DM0000 is transferred to DM0001.(5): Latest stop duration is transferred to DM0000.
Indirect addressing of the data memory (format: #TMxx) can be performed using tempo-rary data memory (such as TM10 and TM11).
When word shifting (1) is performed, for example, #00003 and #0004 are specified respectively for TM10 and TM11to transfer data from #TM10 to #TM11 using the LDA instruction and STA instruction.
Word shifting of (1) to (4): Transfer from #TM10 to #TM11 is repeated using the FOR-NEXT instructions.
➮ To use the FOR-NEXT instructions in combination with indirect addressing of data memory, refer to examples 1 and 2 ofFOR-NEXT applications of the visual KV Series Users Manual, “Indirect addressing” on page 521.
DM0000:
DM0001:
DM0002
DM0004
#00060 #00148
#00060
#00051
#00148
#00060
Stop 1 (1 min) Stop 2 (2 min and 28 sec) Stop 3 (51 sec)
(5)
DM0000
(4)
DM0001
(3)
DM0002
(2)
DM0003 DM0004
(1)
Latest stop duration
gnitfihsdroW 01MTfoeulaVyltceridninoitanitseD01MT#ybdesserdda
01MTfoeulaVyltceridninoitanitseD11MT#ybdesserdda
)1( 30000# 3000MD 40000# 4000MD
)2( 20000# 2000MD 30000# 3000MD
)3( 10000# 1000MD 20000# 2000MD
)4( 00000# 0000MD 10000# 1000MD
Outline
25
VOL. 11 Word shifting
ON duration of input 0000 is stored intotemporary data memory TM05.
NEXT
RET
END
SBN00
FOR#00004
0001
0002
0000
1001
1000
1000
2002
2002
0003
0004
0005
0006
0007
0008
0009
0010
0011
0012
2002
TM05STA
TM04SUB
#65535LDA
TM04STA
T000LDA
TM03DEC
TM02DEC
#TM03STA
#TM02LDA
TM03STA
#00004LDA
TM02STA
#00003LDA
#TM03STA
TM05LDA
1001SET
1001RES
00CALL
#65535T000
1000DIFD
0000
1001
1000
1000
DM0000STA
TM05LDA
DM0001STA
DM0000LDA
DM0002STA
DM0001LDA
DM0003STA
DM0002LDA
DM0004STA
DM0003LDA
TM05STA
TM04SUB
#65535LDA
TM04STA
T000LDA
1001SET
1001RES
#65535T000
1000DIFD
FOR#00004
At the rising edge of input to 0000, subroutineprogram is called.
Subroutine for executing word shifting
To execute word shifting (1) first, DM0003 andDM0004 are specified using TM02 and TM03.
Program between FOR and NEXT is repeated4 times.
Content of the data memory indirectly-addressed by TM02 is transferred to the datamemory indirectly-addressed by TM03. Then,the value of TM02 and that of TM03 aredecremented respectively by one, and datamemory No. for the next word shifting isspecified.
After execution of program between FORand NEXT is terminated, the latest stopduration is transferred to the data memory(DM0000) indirectly-addressed by TM03.
Tips
Word shifting (1) is executed.
Word shifting (2) is executed.
Word shifting (3) is executed.
Word shifting (4) is executed.
Word shifting (5) is executed.
When indirect addressing is used, what you haveto do is just to change the value of operand for theFOR instruction. The program does not becomelonger.
Just change this value!
Programming Example
If indirect addressing of data memory using temporary data memory is not used for theabove programming, program for word shifting (for which LDA instruction and STA instructionare used) is shown below.
If word shifting is executed 20times using the LDA instructionand STA instruction, programbecomes longer as frequencyof execution increases.
VOL.Example
26
12
Line 1Defective productinput: 0003Air discharge: 0500
Line 2Defective productinput: 0004Air discharge: 0501
Line 3Defective product input: 0005Air discharge: 0502
Setting
Digital trimmer
Digital trimmer
#00000to #65535
Internal register Input 0000: When turned ON, it updates thepreset value of the timer for line 1.
Input 0001: When turned ON, it updates thepreset value of the timer for line 2.
Input 0002: When turned ON, it updates thepreset value of the timer for line 3.
Outline
Fine adjustment with a digital trimmerFine adjustment of the air discharge time of a parts feeder
In a factory with several lines, defective products are discharged by air. The digital trimmer of the Visual KV Seriescan be used to adjust the air discharge time for each line according to the size and interval of products.
The digital trimmer mode of the Access Window enables the adjustment of the air discharge without the handheldprogrammer or an external input device.
■ Programming Technique
Use the TMIN instruction to set the digital trimmer.Store the preset value of the Visual KV series’ digital trimmer in the internal register. The value is set in the KV’sinternal timer as the air discharge time for each line.Enter the preset value for each line by changing the preset input respectively.
Visual KV Series
27
VOL. 12 Fine adjustment with a digital trimmer
0001
0002
0003
0004
0005
0006
0007
0008
0009
0010
0011
00120502
0005
0501
0004
0500
0003
2002
0000
0000
0000 0001
0001
T000
0001 0002
0002
0002 1002
0500
T001 0501
T002 0502
1001
1000
0TMIN
1000 T000STA
1001 T001STA
1002 T002STA
#00080 000ST
#00150 001ST
#00230 002ST
2008 #01000DW
DM1938
Interlock circuit of input relays 0000 to 0002When 0000 turns ON, compressed air releasetime for line 1 is updated.When 0001 turns ON, compressed air releasetime for line 2 is updated.When 0002 turns ON, compressed air releasetime for line 3 is updated.
The preset values of the digital trimmer arechanged to the preset values of timers T000 toT002.
T000: Compressed air release time for line 1T001: Compressed air release time for line 2T002: Compressed air release time for line 3
When input of detecting defective for line 1(0003) turns ON, one-shot output is sentthrough 0500.
When input of detecting defective for line 2(0004) turns ON, one-shot output is sentthrough 0501.
When input of detecting defective for line 3(0005) turns ON, one-shot output is sentthrough 502.
Tips
Programming Example
To set the range for the digital trimmer adjustment, specify the upper limitvalue in data memory.
Digital trimmer 0 Upper limit value: DM1938Digital trimmer 1 Upper limit value: DM1939
Set the upper limit value by specifying it in the device mode of the Access Window or bywriting it in the program.
Example:
To set the range of 0 to 1000:
VOL.Example
28
13
6 5 4RST 3 2 1
Line 1
Line 2
Line 3
Line 4
Line 5
Pulse
This is repeated until the value of thedata memory is 0.
The CMP instruction checkswhether the value of the data memory is 0.
Each time a pulse is output, the value ofthe data memory is decremented by one.
Outline
Visual KV Series
Receiving multiple pulses andoutputting them as a batchDisplaying total number of products travelling on multiple lines on a coun-
terThe total number of products on all lines is counted. Then, the same number of pulses as counted products areoutput to the RC Series high speed counter to display the total number on the counter.
■ Programming Technique
Create an up-down counter using the INC instruction and DEC instruction.
• To count the total number of products on the line, the INC instruction is used.➮ Refer to No. 1 “Counting total number of products”.
• Since the total count is stored in the data memory, the same number of pulses as the stored value are output tothe RC Series.
In the example from No.1 “Counting total number of products”, the data memory is used. When the temporary datamemory is used instead of the data memory, the value of the memory is reset to 0 automatically when power isturned OFF.
Note 1: If the pulse period of the count input is very short, the RC’s display will not follow the flow of products.Note 2: Use the KV with transistor or MOS-FET type outputs.
RC Series Counter
FS Series Fiberoptic Sensor
29
VOL. 13 Receiving multiple pulses and outputting them as a batch
2002
0000
0001
0002
0003
0004
2002
T000
0001
0002
0003
0004
0005
0006
0007
0008
0009
0010
0011
0012
TM02INC
TM02INC
TM02INC
TM02INC
TM02INC
TM02DEC
2010 T000#00000CMP
TM02LDA
0500
#00010 000HT
HSP0000
HSP0001
HSP0002
HSP0003
HSP0004
The time constant of input relays 0000 to 0004 isset to 10 µs so that high speed inputs can bereceived.(If you use an input device that chatters, such asa limit switch, do not use the HSP instruction.)
Each time one of input relays 0000 to 0004 turnsON, the value of temporary data memory TM02 isincremented by one.
When the value of temporary data memory TM02is not #00000, timer T000 cycles ON and OFFeach 0.1 sec.
Each time timer T000 turns ON, the value ofTM02 is decremented by one and output is sentthrough 0500.
Tips
2002 2011
1000
0500
0500 TM02DEC
KEEPSET 0500
RES
0500
1000#00000CMP
TM02LDA
Programming Example
To minimize the response delay of the counter display, the following cir-cuit is recommended.
When this circuit is replaced with that on the 11th and 12th lines of the above program, 0500turn ON every two scans. Accordingly, the RC counts once in two scans.
When the scan time is 0.3 ms, for example, the RC counts every 0.6 ms. Higher speedresponse can be obtained by using the above circuit than by using the 1-ms timer.
VOL.Example
30
Converting high speed pulses intolow speed pulses14Converting pulse frequency
High speed pulses emitted from the high speed response fiberoptic sensor FS-M1H are converted into low speedpulses, and the same number of low speed pulses are output to an electromagnetic counter or host controller.
■ Programming TechniqueThe number of high speed pulses are counted using CTH0, and low speed pulses are output until the high speedpulse count is the same as that of low speed pulses.
High speed pulses are counted using CTH0. Low speed pulses are uniformly output to control the internal timer.The value of the temporary data memory is incremented by one each time a pulse is sent. The pulses continue tobe output until the value of the temporary data memory equals the count value of CTH0.
The width and period of pulses to be output through 0500 can be set as required using timers T000 and T001.
Pulse width =preset value of T001 - preset value of T000Pulse period = preset value of T001
Note: Frequency of low speed pulses depends on error margin of timers T000 and T001.
➮ To count the number of cyclic outputs using the temporary data memory, refer to No. 13 “Receiving Multiple Pulses thenOutputting Them as A Batch”.
Electromagnetic counterLarge host controller
Low speed pulseHigh speed pulse
Visual KV Series
2002
T000
T001
2010 T001TM02CMP
CTH0LDA
0500
#00100 000ST
#00200 001ST
TM02INC
TM02: Used for counting the number of low speed pulses
Outline
31
Programming Example
VOL. 14 Converting high speed pulses into low speed pulses
2002
0001
0002
#00000LDA
2100STA
CTH0RES
0003
0004CTH0LDA
TM02CMP
2002
2002
0005T000
0006T001
2010 T001
TM02INC
0500
2008
HSP0004
CTH00004
#00200 001ST
#00100 000ST
When the operation is started, reset high-speed counter CTH0 to the initial setting.
The input time constant for input 0004 is setto 10 µs.
High speed pulses are input through 0004.
Pulses whose width is 100 ms and whoseperiod is 200 ms are cyclic-output through0500 until the count value of high speed pulsesbecomes same as that of low speed pulses.
Each time T001 turns ON, the value of TM02is incremented by one.
In the above program, up to 65,535 (maximum number that high speed counter can count)high speed pulses can be converted into low speed pulses. (When 24 bit mode is used, themaximum count is 16,777,215.) When more than 65,535 pulses need be counted, a pro-gram should be created so that the following conditions are satisfied:
Overflow frequency of high speed pulses = overflow frequency of lowspeed pulsesCount value of high speed pulses is same as that of low speed pulsesThe programming example is shown below.
Number of low speed pulses that are output:
Overflow frequency of high speed pulses x 65,535 + count value of high speed pulses.
Pulses whose width is 100 ms and whose period is200 ms are cyclic-output through 0500 until thecount value of high speed pulses becomes same asthat of low speed pulses.
20080001
20020002
2002
20020003
0004
0005
0006
0007
0008
0009
0010
0011
0012
0013
0014
EICTH0RES
2103SET
0004HSP
0004CTH0
END
CTC0INT
RETI
ENDH
#65535CTC0
CTH0LDA
TM02CMP
2010 1000
T001
2002
2010 #00000LDA
TM02STA
TM03INC
TM10INC
TM02INC
TM02LDA
#65535CMP
T000
TM10LDA
TM03CMP
2010
T000
1001
0500
1000
1001
#00100000S
T#00200
001ST
When CTH0 counts up to 65,535 (overflow occurs),the overflow frequency is stored in TM10.TM02: Used for counting the number of low speed
pulsesTM03: Used for counting the overflow frequency of
low speed pulsesTM10: Used for counting the overflow frequency of
high speed pulses
Tips
When the value of TM02 exceeds 65,535 (overflowoccurs), the overflow frequency is stored in TM03.
VOL.Example
32
Bit counting (Bit checking)15Checking how many error detection signals are input to input relays of channel
The KV checks how many sensors for detecting errors (that are connected to input relays 0000 to 0015 of channel0) are currently turned ON, allowing you to confirm the total number of errors.
■ Programming TechniqueThe KV checks whether each input relay is ON, and the number of relays that are ON are counted.
Use the RRA instruction to check the status of input relays.
Procedures1. The status of the input relays of channel 0 are entered into the internal register using the LDA instruction.
2. Contents of the internal register are shifted right by one bit using the RRA instruction.
3. Contents of the rightmost bit is entered into special utility relay 2009. When the contents of 2009 is 1 (ON), 1 isadded to the number of errors.
The above operation is repeated 16 times (number of bits of channel 0).
The SRA instruction can be used in the same way.
➮ Refer to KV Series Users Manual, “Change in status of special utility relays by arithmetic instruction” on page 580 to 582.
0 0 1 5
OFF0 0 1 4 0 0 1 3
OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0
ONONONON
Visual KV Series
Errordetection
input
Four errors are detected.
0 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0
11 0 0 0 0 1 0 0 1 0 0 0 0 00
0 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0
02 0 0 9
10 1 0 0 0 0 1 0 0 1 0 0 0 00
0000LDA
#01RRA
When content of 2009 is 1 (ON), 1 is added to the number of errors.When content of 2009 is 0 (OFF), no action is performed.
Repeated16 times.
Outline
33
VOL. 15 Bit counting (Bit checking)
Programming Example
FOR
NEXT
0000LDA
TM10INC
#01RRA
TM10STA
#00000LDA
TM10LDA
DM0000STA
#00016
20022002 2009
2002
20020001
0002
0003
0004
0005
The ON/OFF status of the input relays of channel0 are always entered into the internal register.
16 bits of the internal register are checked.
Bits are shifted right one by one each time the bitof 2009 is checked, and the value of TM10 isincremented by one when 2009 turns ON.
After the 16 bits are checked, the value of TM10 istransferred to DM0000 and the value of TM10 isreset to 0. The value entered into DM0000 is thenumber of inputs that turns ON.
When some of the input relays of channel 0 are used for purposes other than error detection,the ON/OFF status of those input relays should not be subjected to bit checking.
Immediately after status of the input relays of channel 0 are read using the LDA instruc-tion, fetch only status of the desired inputs using the ANDA instruction.
Example
When input 0006 is not used for error detection input:
As shown above, the status of error detection input relays only can be read, allowing thenumber of errors to be counted.When the input relays of another channel, in addition to channel 0, are also used for errordetection input, specify the desired channel for LDA and create the same program as theabove, then combine it with the above program.
➮ The number of error detection inputs can be counted using the INC instruction more easily thanusing the C (Counter) instruction. For details, refer to No. 1 “Counting total number of products”.
Tips
$FFBFANDA
0000LDA
20020001
0 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0
0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0
0 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0
0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 1
$FFBFANDA
#01RRA
0000LDA
0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 00 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8
0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 1
0 0 1 5 0 0 1 4 0 0 1 3 0 0 1 2 0 0 1 1 0 0 1 0 0 0 0 9 0 0 0 8 0 0 0 7 0 0 0 6 0 0 0 5 0 0 0 4 0 0 0 3 0 0 0 2 0 0 0 1 0 0 0 0
1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1
2 0 0 9
1
VOL.Example
34
O K
O K
O K
N G
N G
DM0004
DM0002
DM0001
DM0003
DM0000
O K
N G
N G
DM0004
DM0002
DM0001
DM0003
DM0000
O K
O K
Blank
Shift register simulation in an asyn-chronous production line16Ejecting rejects without a constant synchronous signal
When interval between workpieces on the production line varies, rejects are correctly ejected only by using sensorsfor detecting rejects and for confirming a workpiece in the ejection position.
• Inputting clock pulses (synchronous signal) for a timing cam is not required.
■ Programming TechniqueSince the clock pulse input to control the position of a reject on the line is not used, the SFT instruction cannot beused. ➮ Refer to No. 2 “Shift register”.
Then, use the data memory to eject rejects.Information whether each workpiece is acceptable or not is stored sequentially into the data memory. When eachworkpiece reaches the ejection position, the workpiece is accepted or ejected according to the stored information.
First-in first-out (FIFO) queuing is used to store and read data.
Ejection process
Box forreceivingrejects
Sensor for synchronizationINPUT 0000
Even if interval between workpieces is not constant,rejects can still be correctly ejected.
Sensor for confirmingworkpiece in ejectionposition INPUT 0002
Sensor fordetecting rejectsINPUT 0001
Inspection process
Reject detection input: 0001
Ejection
When input from theworkpiece confirmationsensor at the ejection position(0002) turns ON
Outline
35
0001
0002
2008
0000
0002 1001
0500
0003
0004
0005
0006
0007
0008
0009
0010
0011
1000
$1111CMP
DM0000LDA
DM0000STA
$FFFFLDA
$FFFF
DM0001DW
DM0000STA
DM0001LDA
$FFFFCMP
DM0000LDA
2002 2010
$FFFF
DM0002DW
DM0001STA
DM0002LDA
$FFFFCMP
DM0001LDA
2002 2010
$FFFF
DM0003DW
DM0002STA
DM0003LDA
$FFFFCMP
DM0002LDA
2002 2010
$FFFF
DM0004DW
DM0003STA
DM0004LDA
$FFFFCMP
DM0003LDA
2002 2010
STADMOOO2
STADMOOO4
STADMOOO3
STADMOOO1
STADMOOO0
LDA$FFFF
STADMOOO4
LDA$1111
STADMOOO4
LDA$00000001
0001
100020101001DIFU
#00010T000
0500T000
Programming Example
The important point is that the blank data is entered into the contents ofthe data memory after a defective workpiece is ejected.
On the 8th to 11th lines of the above program, the contents of data memory DM0000 ismade blank after a reject is ejected. To perform the next ejection, the contents of the nextdata memory (DM0001) must be transferred to DM0000. Blank data memory is expressed as$FFFF, and the contents of data memories DM0001 to DM0004 is transferred sequentially tothe previous data memory to fill the data memory where $FFFF is written.
By changing content of the data memory, product types can be differentiated.In addition to acceptable ($0000) and defective ($1111), other information can be digitalizedand entered into the data memories. This allows differentiation between product types.
Example
Product type 1 ($0100), product type 2 ($0200), product type 3 ($0300), etc.
When power is turned ON, $FFFF is written intoDM0000 to DM0004. $FFFF assumes that content ofthe data memories is blank.
When input 0000 (input from sensor for synchroniza-tion) turns ON, detection of rejects is performed (0001).
Acceptable workpiece: $0000 is entered into DM0004.Defective workpiece: $1111 is entered into DM0004.
When the workpiece in ejection position is defective($1111), output is sent through 1000.After workpiece acceptability has been determined,the contents of DM0000 is erased.
When the contents of DM0000 to DM0004 isblank, the contents of each data memory istransferred to the previous data memory.
O K
O K
N G
DM0002
DM0001
DM0003
DM0000
O K
N G
N G O K
N G
O K
O K
Blank
Blank
Blank
VOL. 16 Shift register simulation in an asynchronous production line
When the workpiece is defective, a one-shot output issent through 0500.
Contents of data
$FFFF: No data (blank)$0000: Acceptable$1111: Defective
Tips
VOL.Example
36
Emergency stop circuit17Emergency stop for cutting work
■ Programming Technique
Use the MC-MCR instructions for performing an emergency stop.
Put the cutting program between the MC and MCR instructions and create the program so that the MC instructionis set to OFF when an emergency stop signal is input. Then the cutting process, which was interrupted by anemergency stop signal, is stored and can resume when the emergency stop is canceled.
Configure program as follows:
Control circuit and emergency stop circuit can be programmed as 2 independent steps.
Operation procedures
Visual KV Series
➞➞
➞➞
Releasing chuck
Retreatingcutting tool
Advancing cuttingtool and machiningworkpiece
Rotating workpiece
Closing chuck Emergency stop
?????
?????
????? ????? ?????RST
?????
?????
SET
?????
????? ?????SET
????? ????? ?????RES
MC
MCR
?????
?????
Emergency stop input
Outline
Emergency stop
An emergency stop is performed in the cutting process shown below.
37
VOL. 17 Emergency stop circuit
Programming Example
* When operation resumes, after the emergency stop is canceled(0005: OFF), all relays except for output relays* are reactivated in thesame status (ON/OFF) as before the emergency stop was performed.The timer, however, operates from its initial status.
* Outputs are set to OFF when an emergency stop is performed.
When 0000 turns ON, STG 1000 turns ON andthe cutting operation starts.
1000STG
1001JMP
1002JMP
1003JMP
1000JMP
1001STG
1002STG
#00030T000
1003STG
0001
0002
0003
0004
0005
0006
0007
MC
0501SET
0500
0502
0504
0002
0003
0000
0001
0503
0000 1000SET
MCR
0005
0501RES
T000
When 0005 turns ON, an emergency stop isperformed. (All outputs between MC and MCRinstructions are turned OFF.)The chuck closes and execution is transferred toSTG 1001 when chuck confirmation input is setto ON.The motor starts and the cutting tool advances.When the cutting tool reaches the other end,execution is transferred to STG 1002.The motor stops after 3 sec and the cutting toolis retracted. When the cutting tool reaches itsorigin, execution is transferred to STG 1003.The chuck is released and the system waits fora restart.
ENDS0005
2003
2003
0005
SFTD 1000
CLK
1003RES
0000: Start0001: Confirming chuck closing0002: Confirming advance end0003: Confirming retreat end0500: Closing chuck0501: Rotating motor0502: Advancing cutting tool0503: Retreating cutting tool
For users who need a complete reset when the emergency stop is per-formedTo perform a complete reset when the emergency stop is performed, add the following stepto the above program as the 8th line.
By adding the above step, execution of all STG instructions is stopped. The above is effectivefor resetting all relays when the STG instruction and JMP instruction are used in a sequentialprocess.
Even when processes other than a sequential process are controlled, the SFT instructioncan be used conveniently to reset all the specified internal relays.
➮ When input 0005 turns ON, internal relays 1000 to 1003 can be reset.
Tips
VOL.Example
38
Selection of operation mode18Selecting fully-automatic or individual operation mode
On a production line with multiple processing machines, the fully-automatic or individual operation mode is se-lected. (fully-automatic operation mode allows workpieces to be transferred sequentially to each machine, whileindividual operation mode allows each machine to be operated by pressing a pushbutton.)
■ Programming TechniquePoints are as follows:
1. Sequential processing is controlled.2. Because one process is controlled using two inputs (fully-automatic and individual), a double-input coil is ap-
plied.
The STG instruction and JMP instruction are optimal for controlling the process shownabove.
For the STG instruction, one coil can be used as the output for 2 relays as shown below.
By programming internal relays 1000 and 1001 not to turn ON simultaneously, the ON/OFF of 0500 can be control-led using the STG instruction for internal relays 1000 and 1001.
0007 0008 0009
Con
firm
ing
wor
kpie
ce s
ettin
gP
roce
ssin
g 2
Eje
ctin
g w
orkp
iece
Con
firm
ing
wor
kpie
ce s
ettin
gP
roce
ssin
g 3
Pushbutton forindividual operation
Fully-automatic
Individual
Selector switch0000
Eje
ctin
g w
orkp
iece
Eje
ctin
g w
orkp
iece
Pro
cess
ing
1
Con
firm
ing
wor
kpie
ce s
ettin
g
Processingmachine 1
Processingmachine 2
Processingmachine 3
0001
0002
1001
1000
0500
0500
1000STG
1001STG
Outline
39
Programming Example
000020080001
0002
0003
0004
0005
0006
0007
0008
0009
0010
0011
0012
0013
0014
0001 0002
1201
1000STG
1001JMP
ENDS0003
1201
1001STG
0005
1201
1002STG
0500
0501
0502
0004
0006
0007
1200
1100STG
05000001
05020005
0008
0009
05010003
0000 1200
1201
1002JMP
1000JMP
ENDS
ENDS
ENDS1200DIFU1201DIFU
1000SET
1100SET
1000SET1100SET
C000
0000
When power is turned ON, STG 1000 (fully-automatic operationmode) is selected when the input for the selector switch turns ON.At this time, STG 1100 (individual operation mode) is selectedwhen the input for the selector switch turns OFF.
Fully-automatic operation modeControl of processing machine 1:After confirmation of workpiece setting, processing, andconfirmation of workpiece ejection are completed, execution istransferred to STG 1001 (processing machine 2).
The STG instruction for the fully-automatic operation mode iscanceled.
Control of processing machine 2:After confirmation of workpiece setting, processing, andconfirmation of workpiece ejection are completed, execution istransferred to STG 1002 (processing machine 3).
The STG instruction for the fully-automatic operation mode iscanceled.
Control of processing machine 3:After confirmation of workpiece setting, processing, andconfirmation of workpiece ejection are completed, execution istransferred to STG 1000 (processing machine 1).
The STG instruction for the fully-automatic operation mode iscanceled.
Individual operation modeControl of processing machine 1: After workpiece setting isconfirmed, each workpiece is processed by pressing thepushbutton switch.Control of processing machine 2: After workpiece setting isconfirmed, each workpiece is processed by pressing thepushbutton switch.Control of processing machine 3: After workpiece setting isconfirmed, each workpiece is processed by pressing thepushbutton switch.
The STG instruction for the individual operation mode iscanceled.
The STG instruction for the individual operation mode iscanceled, and the fully-automatic operation mode is selected.
The STG instruction for the fully-automatic operation mode iscanceled and the individual operation mode is selected.
ENDSC000#00005
0006C000
C000
Description of terminals0000: Mode selector switch0001: Confirming workpiece setting (processing machine 1)0002: Confirming workpiece ejection (processing machine 1)0003: Confirming workpiece setting (processing machine 2)0004: Confirming workpiece ejection (processing machine 2)0005: Confirming workpiece setting (processing machine 3)0006: Confirming workpiece ejection (processing machine 3)0007: Pushbutton switch for individual operation (processing machine 1)0008: Pushbutton switch for individual operation (processing machine 2)0009: Pushbutton switch for individual operation (processing machine 3)0500: Processing output (processing machine 1)0501: Processing output (processing machine 2)0502: Processing output (processing machine 3)
VOL. 18 Selection of operation mode
To repeat a cycle of fully-automatic operation several times, add the following step to theabove program as the 11th line of the program.Example
To repeat a cycle of fully-automatic operation 5 times:
The number of times that input 0006 turns on, indicating the completion of one cycle opera-tion (completion of machine 3 process), is counted. When the count value reaches thepreset value, the entire process operation is terminated. (To restart operation, turn ON input0000 again.)
Tips
VOL.Example
40
Step-progress operation(sequential control)19
When the step-progress operation is specified, pressing the start button changes the operation process one by one.
■ Programming Technique
W-UE (wait up edge) instruction is useful for step-progress operation.When the W-UE instruction is used with the STG and JMP instructions, one start button allows the step-progressoperation (sequential control) of every process.
12
4
56
7
8
3
Parts feeder
StageStart
Step
Auto
Operation panel
Origin point
1. Lowering the arm
2. Clamping
3. Raising the arm
4. Forwarding the arm
5. Lowering the arm
6. Unclamping
7. Raising the arm
8. Returning the arm
STG1001
JMP100211010000
1101
0500
STG1002
JMP100311020000
1102
0501
STG1003
JMP100411030000
1103
0502
Start button
DIFU1101
0500
0000
JMP1002
STG1001 1101
DIFU1102
0501
0000
JMP1003
STG1002 1102
DIFU1103
0502
0000
JMP1004
STG1003 1103
Start button: 0000
When the STG and JMP instructions are used for the control of each process, the program can be created inde-pendently. This allows for easy programming.
Without W-UE instruction: Complicated
Outline
With W-UE instruction: Simple
Step progress of material handling machine
41
VOL. 19 Step-progress operation (sequential control)
Programming Example
00050001
00021100
1000SET
1000STG
10010000
1100JMP
000311011001 0500
STG10020000
1101JMP
000411021002 0501
STG10030000JMP
000511031003 0502
STG10040000
1103JMP
000611041004 0503
STG10050000
1104JMP
000711051005 0501
STG10060000
1105JMP
000811061006 0504
STG10070000
1106JMP
000911071007 0502
STG10080000
1107JMP
001011081008 0505
STG10000000
1108JMP
1102
When 0005 turns ON, the step-progress operationis enabled.
When 0000 turns ON, the arm is lowered.
When 0000 turns ON, the product is clamped.
When 0000 turns ON, the arm is raised.
When 0000 turns ON, the arm is forwarded.
When 0000 turns ON, the arm is lowered.
When 0000 turns ON, the product is unclamped.
When 0000 turns ON, the arm is raised.
When 0000 turns ON, the arm returns.
When 0000 turns ON, the arm goes back to theorigin point.
0000: Start button0005: Step-progress operation setting0500: Lowering the arm
0501: Clamping0502: Raising the arm0503: Forwarding the arm
0504: Unclamping0505: Returning the arm
0005
2002
1000 1100
SET
STG JMP
1000
RES1100
1001 1100STG JMPRES
1100
1002 1100STG JMPRES
1100
0000
1100
0500
0501
1001
1002
1003
Save the internal relay by setting the step-progress operation using the W-UE instruction.
Since the W-UE instruction does not allow for the duplication of the second operand, theprogramming example above requires several internal relays.
However, the following program requires only the one point of an internal relay.
The point is that the internal relay 1100 used for the W-UEinstruction resets itself.
0000
????
Tips
VOL.Example
42
Frequency counter function20Counting the number of rotations using the frequency counter
With the frequency counter function, which the Visual KV Series features as standard, measure the time for theoutput pulse of a rotating object received through input 0004 with the high-speed counter and convert it into afrequency (Hz). The measured frequency is used for the calculation of the number of rotations (rpm).
Applications: Detecting the reduction in the number of rotations of a magnet, detecting the reduction in the numberof rotations of an agitator, and measuring the frequency of a rotating object
■ Programming TechniqueThe frequency counter function of high-speed counter CTH0 enables the measurement of the frequency of 30 kHzat maximum.Input the pulses for the frequency measurement to 0004. (In this case, phase B input 0006 is ignored.)
Devices used for the frequency counter functionSpecial utility relay2305: Enable/disable the frequency counter function ON: Enable, OFF: Disable
Data memoriesDM1404: Measurement cycle of frequency count (1 to 9999 [ms])DM1405: Result of frequency count (Hz)
Turning ON special utility relay 2305 starts the frequency counter function. The measurement result (Hz) is stored inDM1405.To set the interval of the frequency measurement (ms), specify the value larger than the scanning time in DM1404in the unit of ms.The number of rotations can be obtained from the measured frequency with the following calculation:
No. of rotations (rpm) = Frequency (Hz) x 60 (sec.) / (No. of pulses for one rotation)
Note: When setting the measurement cycle, limit the number of pulses that are input during one measurementcycle within the range of 2 to 65535.The frequency counter function and high-speed counter CTH0 cannot be used at the same time.
Proximity sensor
Pulse
Visual KV Series
Outline
43
Programming ExampleCount the number of rotations of the gear which requires 10 pulses for one rotation.Count the frequency of the pulses received through input 0004 every second (1000 ms). Store the result inDM0000 and store the calculated number of rotations in DM0001.
VOL.20 Frequency counter function
2008
2002
DM1404STA
#01000LDA
DM1405LDA
DM0000STA
#00010DIV
DM0001STA
DM0000LDA
#00060MUL
2002
END
ENDH
HSP0004
2305SET
DM0001 > DM0010: Lo output2002 2009
2002 2009
2009 1002
1001
1000DM0010CMP
DM0001LDA
DM0011CMP DM0010 DM0001 < DM0011: Go output
DM0011 DM0001: Hi output
After the measurement cycle of the pulses is set to 1000 ms(1 sec.). The frequency counter start relay 2305 is turned ON.
The input time constant for input 0004 is set to 10 µs.
The measured frequency (Hz) is stored in DM0000.
The number of rotations (rpm) is calculated with the meas-ured frequency and is stored in DM0001.
To obtain the signals of Hi, Go, and Lo using the number of rotations, use the COMPARE(CMP) instruction in the program.
Tips
VOL.Example
44
Sorting21Sorting machines in the ascending order of production
In the production site with multiple-injection molding machines, the Visual KV Series counts the number of moldedproducts of each machine. The resulting with count can be used to determine the machine of low production.
* This example uses 5 machines for simplification. This application is more effective with a greater number ofmachines.
■ Programming TechniquePrepare data memories for each machine to register the machine No. and the count value. (Example: Machine 1:DM0011 for machine No., DM0001 for count value)The sorting uses these data memories.
The large/small comparison of all target data memories is repeated and the data memo-ries are sorted.
Flow chart of large/small comparison
It is convenient to use the indirect addressing with temporary data memory in order to specify the data memorynumber (*).
C001=#2500
C002=#2200
C003=#2400
C004=#2100
C005=#2300
DM0012=#0002: DM0002=#2200
DM0013=#0005: DM0003=#2300
DM0014=#0003: DM0004=#2400
DM0015=#0001: DM0005=#2500
DM0011=#0004: DM0001=#2100
<Before sorting> <After sorting>
Machine No. Count value
Machine 1
Machine 2
Machine 3
Machine 4
Machine 5 High
Low
DM(*)>DM(*+1) DM(*)≤DM(*+1)
DM(*): DM0001 to DM0005
(*+1)≤5
(*+1)>5
Start
Compares the data of DM (*) with DM (*+1)
Switches the data and machine Nos. in DM(*) and DM (*+1).
Compares the new data in DM (*) with thedata in DM (*-1). Repeats the comparisonuntil the data memory number (*) becomesthe initial number (0001).
End
Repeats the comparison until the data memorynumber (*+1) becomes the last number (0005).
Outline
45
VOL. 21 Sorting
Programming Example
Sorting busy relay 1000 is set at therising edge of 0000. The data memoryand temporary data memory are set tothe initial settings.
#00001LDA
TM10STA
#00002LDA
TM11STA
#00011LDA
TM12STA
#00005CMP
#00012LDA
TM13STA
#TM11LDA
#TM10STA
TM20STA
#TM10LDA
TM20LDA
#TM11STA
0000
1000
1000
0001
0002
0003
0004
0005
0006
0007
0008
0009
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019
0020
0021
0022
0023
10011001DIFU
03CALL
00CALL
1000SET
1000
TM11LDA
2011
END
01SBN
RET
02SBN
2002
C003LDA
DM0003STA
DM0002STA
C002LDA
DM0001STA
C001LDA
C004LDA
DM0004STA
DM0005STA
C005LDA
#00003DW
DM0013
#00004DW
DM0014
#00002DW
DM0012
#00001DW
DM0011
#00005
DM0015DW
2002
2002
ENDH
#TM11CMP
#TM10LDA
TM11INC
TM12INC
TM13INC
TM10INC
#00005CMP
TM11LDA
2011
CMP#00000
LDATM10 TM11
DECTM10DEC
TM13DEC
TM12DEC
2011
RES
02CALL
01CALL
2010
#TM13LDA
#TM12STA
TM20STA
#TM12LDA
TM20LDA
#TM13STA
RET
00SBN
RET
RET
SBN03
2011
If the value in TM11 is less than “5,” thesubroutine of the sorting is called.
Subroutine for switching the count values.
The data in DM0001 to DM0005 areswitched by using the indirect addressing.
Subroutine for switching the machineNos.The data in DM0011 to DM0015 areswitched by using the indirect addressing.
Subroutine for sorting
To sort values in ascending order, “1” isadded to the data memory No. (*) until“*+1” exceeds the last number “5.” Whenit exceeds “5,” relay 1000 is reset and theoperation finishes.
To sort values other than in ascendingorder, the count values and the machineNos. in data memories are switched. Tocheck the previous comparison, “1” issubtracted from the data memory No. (*)until the number returns to the initialnumber (0).
Subroutine for initial setting of sorting.
The machine Nos. and count values aretemporarily copied in data memories.
* The count inputs for C001 to C005should be prepared separately.
VOL.Example
46
High-speed interrupt input function22
Measure the time during which the target passes two points A and B and calculate the passing speed.The FS-M1H high-speed response photoelectric sensor is used as the sensor. The passing time is measured withthe internal clock of the high-speed counter in the unit of µs.
Applications: Measurement of the swing speed of a golf club head.
■ Programming Technique
Point 1: Measure the passing time with the internal clock of the KV.• Use the KV’s internal clock (1-µs cycle) and the high-speed counter to measure the passing time.
(Passing time) = (Cycle of internal clock: 1 µs) x (No. of clock counts)
Point 2 The interrupt (INT) instruction is the best for the program.• When the sensor detects the target, the interrupt is executed. Store the current value of the high-speed counter
in the data memory.When the interrupt is executed, the current value of the high-speed counter is automatically stored in the datamemory (Input capture function).By using this function, the passing time is obtained as the difference between the stored counter values ofsensor 1 and sensor 2.
(Passing time) = [yyyyy (DM1934) - xxxxx (DM1932)] x (Cycle of internal clock: 1 µs)
ONOFF
ONOFF
Sensor 2INPUT 0003
Sensor 1INPUT 0002
Sensor 1
Sensor 2
Sensor 1
Sensor 2
Internal clock(1 µs) No. of clock
counts
Passingtime
DM1934DM1932
No. of clockcounts
Sensor 1(Interrupt 0002)
Passingtime
Sensor 2(Interrupt 0003)
Internal clock(1 µs)
No. of pulses = xxxxx No. of pulses = yyyyy
(Value stored by the input capture of 0003)(Value stored by the input capture of 0002)
Measurement of passing time between two points using high-speed interrupt input
Outline
Visual KV Series
Passing time (µs)
47
VOL. 22 High-speed interrupt input function
Programming Example• Measures the time from when input relay 0002 turns ON until input relay 0003 turn ON.• The measured value is written to data memory DM0000 (Unit: µs).• Writes the calculated speed into DM0010 (unit: m/ms).
(This program sets the distance between sensor 1 and sensor 2 to 1 m.)
2008
2002
2002
2412RES
2413RES
2410RES
2411RES
HSP0002
CTH12200
END
0002
RETI
RETI
ENDH
HSP0003
2002 DM0000STA
DM1932SUB
DM1934LDA
DM0010STA
DM0000DIV
#01000MUL
#00001LDA(1) (2)
EI
INT
0003INT
#00100MUL
#00100LDA
DM0000DIV
DM0010STA
#01000MUL
When power is turned on, an EL instruction enablesinterrupts. Sets the interrupt polarity of inputs 0002 and0003 to the rising edge.
Sets the input time constant of inputs 0002 and 0003 to10 µs.
CTH1 counts the pulses using a 1-µs internal clock.
When INT0002 is executed, the current value of CTH1 isautomatically transferred to DM1932 and DM1933 (Inputcapture).
When INT0003 is executed, the current value of CTH1 isautomatically transferred to DM1934 and DM1935 (Inputcapture).
Subtracts the input capture value of INT0002 from thatof INT0003 to obtain the time it takes for the target topass between two points and then writes it to DM0000.(Unit: 1µs)
The passing speed is obtained through calculating (2)the passing time and (1) the distance between the twopoints (unit: m/ms). It is stored in DM0010.
Calculation of passing speedThe passing speed is calculated with the following expression:
Passing speed (m/ms) = ((1) Distance between two points [Unit: m]) / ((2) Passing time [Unit: ms])
In the program above, the passing time is measured in the unit of µs. Therefore, the meas-ured value is multiplied by the factor of 1000 (2) to be converted into the value in the unit ofms. The calculation uses 1 m (1) as the distance between the two points.
To set the distance between the two points in the unit of cm, multiply it by the factor of 100 asthe underlined section in the following program. The unit of speed is set to cm/ms.
To convert the unit of time from µs to s (second), multiply values by the factor of 1,000,000(execute 1,000x twice in a program).
Tips
VOL.Example
48
Synchronous control functionSynchronous control of a pulse motor
23
Synchronize and control the roller speed at the feeding side and the ejecting side of a device.Control is easy when using the frequency counter function and specified frequency pulse output function featuredas standard with the Visual KV Series.
Application: Time adjustment for sheet material remaining in the processing bath.
■ Programming TechniqueUse the frequency counter function of high-speed counter CTH0 to measure the frequency of the pulses (Hz) sentthrough input 0004. Then, use the specified frequency pulse output function to output the pulse of the same fre-quency as the measured input pulse from 0501.
The pulses are output after the frequency is changed according to the measurement result. The response is de-layed by the length of the measurement.
Devices used with the frequency counterSpecial utility relays
Data memory
Devices used with the specified frequency pulse outputSpecial utility relays
Data memory
Pulse input
Pulse output
Pulse input0004
Pulse output0501
(Specified frequency pulse output function)2306: Starts pulse output when turned ON.DM1936: Frequency of output pulse
Pulse output
Datatransfer
(Frequency counter function)CTH0: high-speed counter (Measurement ofpulse period)2305: Enables operation when turned ON.DM1404: Measurement timingDM1405: Measured frequency
Frequency measurement
Outline
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49
VOL. 23 Synchronous control function
Programming ExampleThe frequency of the pulse sent through input 0004 is measured every 100 ms. Then, the pulses of the samefrequency are output from 0501. The pulse output is disabled when the measured frequency is less than 16 Hz.
The measurement cycle is set to 100 ms. The frequency counterstart relay (2305) turns ON.
END
HSP
ENDH
0500
#00100LDA
DM1404STA
DM1405LDA
DM1936STA
00042002
2002
2307
2008
2306SET
2305SET
DM1936STA
#00002DIV
DM1405LDA
2002 2306SET
The input time constant of input 0004 is set to 10 µs.
The specified frequency pulse output start relay (2306) is turnedON. The measured frequency (DM1405, Unit: Hz) is used as theoutput frequency (DM1936, Unit: Hz).Output 0500 turns ON when an error occurs in the setting of thespecified frequency pulse output.
• The pulses of the frequency up to 30 kHz can be measured with the frequency counterfunction.
• The pulses of the frequency up to 50 kHz can be output with the specified frequencypulse output function. (Duty cycle of the pulses is 50%.)
• It is also possible to multiply the measured frequency by the factor of 2 or 1/2 for theoutput.
Example
Output pulses of half frequency of the measured frequency. The pulse output is disabledwhen the measured frequency is less than 16 Hz.
Tips
VOL.Example
50
High-speed counter24Multi-step comparator operation with high-speed counter
By counting the pulses from the encoder, control the feeding amount of cloth and cut it at a specified length.The high-speed counter is used to count the high-speed pulses from the encoder.The number of pulses for the deceleration point, stopping point, and overrunning point are preset in data memories.
Application: Cutting products at a specified length
■ Programming TechniqueThis control requires three preset values of the number of pulses to determine deceleration, stopping, andoverrunning points.The program of multi-step comparator operation can be simplified by using the multi-step comparator mode of thehigh-speed counter’s cam switch function.In the multi-step comparator mode, the value in DM1401 is compared with each preset value (DM 1406 toDM1469). When the value in DM1401 is larger than the preset value, the corresponding relay is turned ON/OFF.Up to 32 points can be set as the preset values.
High-speed counter CTH1 counts the pulses from the encoder received through inputs 0005 and 0007. The currentvalue of CTH1 is transferred to DM1401 as the value for comparison.Set the preset values (comparator values) in DM1406 to DM1469 before the operation.To enable the multi-step comparator operation, turn ON special utility relay 2314.To stop the operation, turn OFF special utility relay 2715.
Devices used in multi-step comparator modeSpecial utility relays2314: Operation start relay (Operation starts when turned ON)2315: Error relay (Turns ON during an error.)2715: In-operation relay (Turns ON during operation.)
Data memoriesDM1400: The initial No. of output relaysDM1401: The value to be compared. (0 to 65535)DM1402: Enter “65535” in the multi-step comparator mode.DM1406: Preset value to turn ON output relay “initial No. + 0” (0 to 65534)DM1407: Preset value to turn OFF output relay “initial No. + 0” (0 to 65534)DM1408: Preset value to turn ON output relay “initial No. + 1” (0 to 65534)DM1409: Preset value to turn OFF output relay “initial No. + 1” (0 to 65534)
: :DM1468: Preset value to turn ON output relay “initial No. + 31” (0 to 65534)DM1469: Preset value to turn OFF output relay “initial No. + 31” (0 to 65534)
Film
Encoder
Pulley fordetection
Cuttingmachine
End of winding
Enter the presetvalue of the numberof pulses for eachpoint.
Alarm
OverrunningCutting
Start of winding
Decrease inwinding speed
Outline
51
VOL. 24 High-speed counter
High-speed counter CTH1 is set to the double multiplication mode.2008 CTH1
RES
2314SET
2213SET
2214RES
END
ENDH
HSP0005
HSP0007
CTH10005
0000
2002
0001
1000
1001
DM1401STA
CTH1LDA
#65535
DM1402DW
#00500
DM1400DW
#10000
DM1406DW
#15000
DM1408DW
#20000
DM1410DW
#16000
DM1409DW
#21000
DM1411DW
#11000
DM1407DW
2715RES
1000DIFU
1001DIFU
2002
Relay 0500 is set as the initial relay to be used in the multi-stepcomparator mode. The multi-step comparator mode is specified.
The positions where relays 0500 to 0502 turn ON/OFF arespecified.
The input time constants for inputs 0005 and 0007 are set to 10 µs.
High-speed counter CTH1 counts the pulses from the encoder.The current value of CTH1 is transferred to DM1401. This value isused for the comparison.
When input 0000 turns ON, the multi-step comparator mode isactivated.
When input 0001 turns ON, The multi-step comparator mode isstopped.
Tips
Programming ExampleWhen input 0001 turns ON, the multi-step comparator mode is enabled.When input 0002 turns ON, the multi-step comparator mode is disabled.Outputs are assigned as follows:Deceleration: 0500, Stopping: 0501, Overrunning: 0502
The multi-step comparator mode compares values with the value stored in DM1401.Therefore, not only the high-speed counter values but also the current values of a timer orcounter can be used for the multi-step comparator operation.
52
53
54
©KEYENCE CORPORATION,1999 NKV-KA-APC-1-0024 Printed in Japan
Specifications are subject to change without notice.
Visit our website for other Keyence products at
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