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Figure 7.2
Ladder Logic for Extending the Count Beyond 999 (PLC-3 Program)
RUNG NUMBER RMO
LES
A < B
A : WN005:0002
0
B : WN005:0003
-500
GRT
A > B
A : WN005:0002
0
B : WN005:0004
500
RUNG NUMBER RM1
RUNG NUMBER RM2
WN005:0002
] / [
17
WN005:0002
]
[
17
RUNG NUMBER RM3
Special Programming
MVM
MOVE WITH MASK
A : WB002:0200
0110000101011100
B : WB005:0000
000011111111111111
R : WB005:0001
0000000101011100
MOV
MOVE FROM A TO R
A : WB005:0001
0000000101011100
R : WN005:0000
348
SUB
A - B = R
A : WN005:0000
348
B : WN005:0001
348
R : WN005:0002
0
C0100
CTU
( CU )
COUNTER UP C0100
CP = 32000
C0100
CA =
4
( DN )
C0100
CTD
( CD )
COUNTR DOWN C0100
CP = 32000
C0100
( DN )
CA =
4
MOV
MOVE FROM A TO R
A : WN005:0000
348
R : WN005:0001
348
Publication 1771 UM006B-EN-P - June 2002
7–3
17
15
16
15
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