Delta AS Series Programming Manual page 430

2. When X0.0 is OFF, the execution of the program goes from NETWORK 1 to NETWORK 2 to NETWORK 3 in
sequence, and the CJ instruction is not executed.
Example 2
1. You can use the CJ instruction between the MC and the MCR instructions in the five conditions below.
(a) The execution of the program jumps from the part of the program outside one MC/MCR loop to the part of
the program outside another MC/MCR loop.
(b) The execution of the program jumps from the part of the program outside the MC/MCR loop to the part of the
program inside the MC/MCR loop.
(c) The execution of the program jumps from the part of the program inside the MC/MCR loop to the part of the
program inside the MC/MCR loop.
(d) The execution of the program jumps from the part of the program inside the MC/MCR loop to the part of the
program outside the MC/MCR loop.
(e) The execution of the program jumps from the part of the program inside one the MC/MCR loop to the part of
the program inside another the MC/MCR loop.
2. When the PLC executes an MC instruction, it puts the previous state of the switch contact onto the top of the stack
inside the PLC. The stack is controlled by the PLC, and cannot be changed. When the PLC executes the MCR
instruction, the PLC pops the previous state of the switch contact from the top of the stack. Under the conditions
listed in (b), (d), and (e) above, the number of times the items are pushed onto the stack may be different from the
number of times the items are popped from the stack. When this situation occurs, at most 32 items can be pushed
onto the stack; items can be popped from the stack until the stack is empty. Therefore, when you use CJ or CJP
with MC and MCR, be careful of how the program pushes items onto the stack and pops items from the stack.
Ch a pt er 6 Ap p l i ed I ns t r uc t i ons
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