13 SFC PROGRAM INSTRUCTIONS
13.1 SFC Control Instructions
1435
13
Deactivating a step
RST [S/BL\S]
This instruction deactivates the specified step.
■Execution condition
■Description, range, data type
■Applicable devices
*1 Only S, BL\S can be used. The devices can be index modified.
• This instruction deactivates the specified step in the specified block.
• When the number of active steps in the specified becomes 0, the specified block will be inactive. If the block start/end bit of
the SFC information device is set, the corresponding bit device turns off.
• If the instruction is executed to an inactive step, the instruction is ignored.
• If no block is specified, the following block is targeted depending on the execution program type.
• The RnCPU and RnENCPU with firmware version "12" or later support this instruction. (Use an engineering tool with version "1.015R" or later.)
• The RnPCPU (process) with firmware version "03" or later supports these instructions. (Use an engineering tool with version "1.020W" or later.)
Ladder ST
ENO:=RST(EN,d);
FBD/LD
Instruction Execution condition
RST
Operand Description Range Data type Data type (label)
(d) Step No. to be deactivated
(Reset (off) target bit device number)
Bit ANY_ELEMENTARY
EN Execution condition Bit BOOL
ENO Execution result Bit BOOL
Operand Bit Word Double word Indirect
specification
Constant Others
(BL\
S)
X, Y, M, L,
SM, F, B, S,
SB, FX, FY
J\ T, ST, C, D, W,
SD, SW, FD, R,
ZR, RD
U\G, J\,
U3E\(H)G
Z LT, LST,
LC
LZ K, H E $
(d)
*1
*1
• Sequence program: Block 0
• SFC program (within the action): Block where the instruction is executed (current block)
RnCPU
RnENCPU
RnSFCPU RnSFCPURnPCPURnPCPU
(Standard) (Safety)
(Redundant)
(Process)
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