Automationdirect.com DL06 - Page 319

DL06 Micro PLC User Manual, 3rd Edition, Rev. E
5-158
Chapter 5: Standard RLL Instructions
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A
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The following diagram shows the scan-by-scan results of the execution for our example program.
Notice how the pointer automatically cycles from 0 to 6, and then starts over at 1 instead of 0.
Also, notice how SP56 is affected by the execution. Although our example does not show it, we
are assuming that there is another part of the program that changes the value in V1500 (data
source) prior to the execution of the STT instruction. This is not required, but it makes it easier
to see how the data source is copied into the table.
V1401 0500
V1402
9999
V1403
XXXX
V1404
XXXX
V1405
XXXX
V1406
XXXX
V1407
XXXX
Table
V1401
0500
V1402
XXXX
V1403
XXXX
V1404
XXXX
V1405
XXXX
V1406
XXXX
V1407
XXXX
Table
V1401
0500
V1402
XXXX
V1403
XXXX
V1404
XXXX
V1405
XXXX
V1406
XXXX
V1407
XXXX
Table
V1401
XXXX
V1402
XXXX
V1403
XXXX
V1404
XXXX
V1405
XXXX
V1406
XXXX
V1407
XXXX
06
1
2
3
4
5
Table
AfterSTT Execution
AfterSTT Execution
AfterSTT Execution
Before STTExecution
Before STTExecution
TablePointer (Autom atically Incremented)
TablePointer (Autom atically Incremented)
.
.
V1500
0500
Before STTExecution AfterSTT Execution
Scan N
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2
3
4
5
Scan N+1
Scan N+5
Source
V1400
0000
TablePointer
V1500
0 500
0
1
2
3
4
5
Source
V1400
0 001
TablePointer (Autom atically Incremented)
V1500
9 999
06
1
2
3
4
5
Source
V1400
0 002
V1401
0500
V1402
9999
V1403
3074
V1404
8989
V1405
1010
V1406
2046
V1407
XXXX
V1500
2 046
06
1
2
3
4
5
Source
V1400
0 006
Table
Before STTExecution
V1500
9999
06
1
2
3
4
5
Source
V1400
0001
TablePointer
V1401
0500
V1402
9999
V1403
3074
V1404
8989
V1405
1010
V1406
XXXX
V1407
XXXX
V1500
2046
06
1
2
3
4
5
Source
V1400
0005
TablePointerTable
SP56=OFF
SP56
SP56=OFF
SP56
SP56=ON
SP56
TablePointer (Resetsto1, not 0)
Scan N+6
V1401
1234
V1402
9999
V1403
3074
V1404
8989
V1405
1010
V1406
2046
V1407
XXXX
V1500
1 234
1
2
3
4
5
Source
V1400
0 001
Table
V1401
0500
V1402
9999
V1403
3074
V1404
8989
V1405
1010
V1406
2046
V1407
XXXX
V1500
1234
06
1
2
3
4
5
Source
V1400
0006
TablePointerTable
SP56=OFF
SP56
SP56=OFF
SP56
SP56=OFF
SP56
SP56=OFF
SP56
SP56=OFF
SP56
6
06
until end of scan
or nextinstruction
that uses SP56
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