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204
Sequence Control Instructions
Section 3-5
Flags
Precautions
Program FOR(512) and NEXT(513) in the same task. Execution will not be
repeated if these instructions aren’t in the same task.
A jump instruction such as JMP(004) may be executed within a FOR-NEXT
loop, but do not jump beyond the FOR-NEXT loop.
The following instructions cannot be used within FOR-NEXT loops:
• Block programming instructions
• MULTIPLE JUMP and JUMP END: JMP(515) and JME(516)
• STEP DEFINE and STEP START: STEP(008)/SNXT(009)
Example
In the following example, the looped program section transfers the content of
D00100 to the address indicated in D00200 and then increments the content
of D00200 by 1.
3-5-8
BREAK LOOP: BREAK(514)
Purpose
Programmed in a FOR-NEXT loop to cancel the execution of the loop for a
given execution condition. The remaining instructions in the loop are pro-
cessed as NOP(000) instructions.
Ladder Symbol
Variations
Applicable Program Areas
Name
Label
Operation
Error Flag
ER
ON if more than 15 loops are nested.
OFF in all other cases.
Equals Flag
=
OFF
Negative Flag
N
OFF
Repeated 3 times.
#0000
D00200
@D00200
&3
D00100
BREAK(514)
Variations
Executed Each Cycle for ON Condition
BREAK(514)
Executed Once for Upward Differentiation
Not supported
Executed Once for Downward Differentiation Not supported
Immediate Refreshing Specification
Not supported
Block program areas
Step program areas
Subroutines
Interrupt tasks
Not allowed
OK
OK
OK
Summary of Contents for CJ1G-CPUxx
Page 3: ...iv N o t i c e ...
Page 5: ...vi ...
Page 21: ...xxii Conformance to EC Directives 6 ...
Page 35: ......
Page 1131: ...1110 CJ series Instruction Execution Times and Number of Steps Section 4 2 ...