Automationdirect.com DirectLOGIC DL205 Series User Manual page 376

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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 decrements from 6 to 0. Also, notice how
SP56 is only on until the end of the scan.
Example of Execution
Scan N
Before RFB Execution
Table
V1401
0
5
9
9
V1402
3
0
V1403
8
9
V1404
1
0
V1405
V1406
2
0
X
X X
V1407
.
.
Scan N+1
Before RFB Execution
Table
0
5
V1401
V1402
9
9
3
0
V1403
8
9
V1404
V1405
1
0
2
0
V1406
X
X X
V1407
.
.
Scan N+4
Before RFB Execution
Table
0
5
V1401
V1402
9
9
3
0
V1403
8
9
V1404
V1405
1
0
2
0
V1406
X
X X
V1407
.
.
Scan N+5
Before RFB Execution
Table
0
5
V1401
V1402
9
9
3
0
V1403
8
9
V1404
1
0
V1405
2
0
V1406
V1407
X
X X
.
.
Table Pointer
0
0
0
6
0
0
1
V1400
9
9
2
Destination
7
4
3
X
X X
X
V1500
8
9
4
1
0
5
SP56
4
6
6
SP56 = OFF
X
Table Pointer
0
0
1
0
0
0
5
V1400
9
9
2
Destination
7
4
3
2
0
4
6
V1500
8
9
4
1
0
5
SP56
4
6
6
SP56 = OFF
X
.
.
.
Table Pointer
0
0
1
0
0
0
2
V1400
9
9
2
Destination
7
4
3
3
0
7
4
V1500
8
9
4
1
0
5
4
6
6
SP56
SP56 = OFF
X
Table Pointer
0
0
0
1
0
0
1
V1400
9
9
2
Destination
7
4
3
9
9
9
9
V1500
8
9
4
1
0
5
4
6
6
SP56
SP56 = OFF
X
Chapter 5: Standard RLL Instructions - Table
After RFB Execution
Table
V1401
0
5
0
0
1
9
9
9
9
2
V1402
3
0
7
4
3
V1403
8
9
8
9
4
V1404
1
0
1
0
5
V1405
V1406
2
0
4
6
6
X
X
X
X
V1407
.
.
After RFB Execution
Table
0
5
0
0
1
V1401
V1402
9
9
9
9
2
3
0
7
4
3
V1403
8
9
8
9
4
V1404
V1405
1
0
1
0
5
2
0
4
6
6
V1406
X
X
X
X
V1407
.
.
After RFB Execution
Table
0
5
0
0
1
V1401
V1402
9
9
9
9
2
3
0
7
4
3
V1403
8
9
8
9
4
V1404
V1405
1
0
1
0
5
2
0
4
6
6
V1406
X
X
X
X
V1407
.
.
After RFB Execution
Table
0
5
0
0
1
V1401
V1402
9
9
9
9
2
3
0
7
4
3
V1403
8
9
8
9
4
V1404
1
0
1
0
5
V1405
2
0
4
6
6
V1406
V1407
X
X
X
X
.
.
DL205 User Manual, 4th Edition, Rev. B
Table Pointer (Automatically Decremented)
0
0
0
5
V1400
Destination
2
0
4
6
V1500
SP56
SP56 = OFF
Table Pointer (Automatically Decremented)
0
0
0
4
V1400
Destination
1
0
1
0
V1500
SP56
SP56 = OFF
Table Pointer (Automatically Decremented)
0
0
0
1
V1400
Destination
9
9
9
9
V1500
SP56
SP56 = OFF
Table Pointer
0
0
0
0
V1400
Destination
0
5
0
0
V1500
SP56
SP56 = ON
until end of scan
or next instruction
that uses SP56
5–159
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D

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