Omron SYSMAC C20K Operation Manual page 143

Step Instructions
0001 (SW A1) 0002 (SW B2)
0001 (SW A1) 0002 (SW B2)
0003 (SW A2)
0004 (SW B2)
0005 (SW D)
132
The following diagram demonstrates the flow of processing and the switches
that are used for execution control. Here, either process A or process B is
used depending on the status of SW A1 and SW B1.
The program for this process, shown below, starts with two SNXT(09) that
start processes A and B. Because of the way 0001 (SWA1) and 0002 (SB
B1) are programmed, only one of these will be executed to start either proc-
ess A or process B. Both of the steps for these processes end with a
SNXT(09) that starts the step for process C.
SNXT(09) 1400
SNXT(09) 1401
STEP(08) 1400
Process A
SNXT(09) 1402
STEP(08) 1401
Process B
SNXT(09) 1402
STEP(08) 1402
Process C
SNXT(09) 1403
SW A1
Process A
SW A2
Process C
SW D
End
Address
0000
0001
0002
0003
Process A
0004
started.
0005
0006
Process A
Address
reset.
0100
Process
0101
C started.
0102
Process B
Address
reset.
0200
Process
0201
C started.
0202
Process C
Address
reset.
0300
0301
STEP(08)
0302
Section 5-18
SW B1
Process B
SW B2
Instruction Operands
LD 0001
AND NOT 0002
SNXT(09) 1400
LD NOT 0001
AND 0002
SNXT(09) 1401
STEP(08) 1400
Instruction Operands
LD 0003
SNXT(09) 1402
STEP(08) 1401
Instruction Operands
LD 0004
SNXT(09) 1402
STEP(08) 1402
Instruction Operands
LD 0005
SNXT(09) 1403
STEP(08)