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MELSEC-Q/QnA
5 SEQUENCE INSTRUCTIONS
• A FEND instruction is executed during an interrupt program, and before the execution of an
IRET instruction. (Error code: 4221)
• A FEND instruction is executed between the CHKCIR and CHKEND instructions.
(Error code: 4230)
• A FEND instruction is executed between the IX and IXEND instructions. (Error code: 4231)
[Program Example]
(1) The following program uses the CJ instruction.
[Ladder Mode]
When XB is ON, jumps to label P23; from
P23, executes the next step
Executed when XB is OFF
Indicates the termination of the sequence
program when XB is OFF
[List Mode]
Steps Instruction
Device
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