Mitsubishi Electric MELSEC iQ-R Series - Page 1440

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13 SFC PROGRAM INSTRUCTIONS
13.1 SFC Control Instructions
Processing details
• This instruction switches the SFC control instruction target block No. of the step (specified by S) to the block No. specified
by (s).
• The effective range of the instruction is as follows depending on the execution program type.
• If the block No. is specified by BL\S, the block No. is switched with or without execution of the instruction.
• The instruction is valid only for the target step. If multiple steps are active in such as a simultaneous sequence, the
instruction needs to be executed for each step.
Operation error
• Sequence program: The block is switched from the point where the instruction is executed to the start of the SFC program. In the next scan, the target block
will be the block 0 (default) until the instruction is executed again.
• SFC program: The block is switched only within the step being executed. Even when the same step is targeted, the instruction must be executed for each
block where the instruction specified by S is used. Moreover, even within a single step, the block is switched only from the point where the instruction is
executed to the END processing of the step. In the next program, the target block will be the current block (default) until the instruction is executed again.
(1) END processing is not performed.
Error code
(SD0)
Description
31A1H The specified block does not exist, or the SFC program is in a standby state.
The instruction is executed when no SFC program (scan execution type) exists or SM321 is off.
31A2H The specified block No. is out of the range, 0 to 319.
0
AB
0
(1)(1)
Block specified by the
instruction
Execution of
the instruction
END instruction
Block specified
by the instruction
Execution of
the instruction
END instruction
Block specified
by the instruction
Current block
Execution of
the instruction
Block n
Block specified
by the instruction
Current block
Execution of
the instruction
END
processing
Block (n+1)
SFC programSequence program Sequence program
Repeated
1 scan
Target block
Execution program