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Programming Concepts Section 1-1
Restrictions
1,2,3... 1. A ladder program must be closed so that signals (power flow) will flow from
the left bus bar to the right bus bar. A rung error will occur if the program is
not closed (but the program can be executed).
2. Output bits, timers, counters and other output instructions cannot be con-
nected directly to the left bus bar. If one is connected directly to the left bus
bar, a rung error will occur during the programming check by the CX-Pro-
grammer. (The program can be executed, but the OUT and MOV(021) will
not be executed.)
Insert an unused N.C. work bit or the ON Condition Flag (Always ON Flag)
if the input must be kept ON at all times.
3. An input bit must always be inserted before and never after an output in-
struction like an output bit. If it is inserted after an output instruction, then
a location error will occur during the CX-Programmer program check.
MOV
Input condition must be provided.
MOV
ON (Always ON Flag)
Unused work bit
102.010.00 0.03
0.01 102.01
0.04
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