Forced Transition Execute & Cancel Instructions (Set, Rst) - Mitsubishi MELSEC-Q Series Programming Manual

4 SFC PROGRAM CONFIGURATION
4.4.9 Forced transition EXECUTE & CANCEL instructions (SET, RST)
Internal Device
File
(System, User)
Register
R
Bit Word
D
[Function]
(1) Forced transition EXECUTE instruction (SET)
(a) A specified transition condition in a specified block is forcibly satisfied, and an unconditional
transition is executed at the step which precedes the condition.
(b) After execution of the instruction, the forced transition status remains effective until a reset
instruction is executed.
(2) Forced transition CANCEL instruction (RST)
(a) Cancels the forced transition setting (designated by SET instruction) at a transition
condition, and restores the transition condition ladder created by the user.
(3) Specify the transition condition as described below.
(a) In the case of SFC program
• Use "TRn" when specifying the transition condition in the current block.
• Use "BLm \TRn" when specifying the transition condition in another block.
(b) In the case of sequence program
• Use "BLm \TRn" when executing the forced transition EXECUTE/CANCEL instruction in
the sequence program.
• When the block number is not specified, specify the block number with the BRSET
instruction.
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Usable Devices
Link Direct
Intelligent
J
\ Function Index
Module Z
Bit Word
U \G
"n" is the step No.
SET D (TRn)
"m" is the block No.
SET D (BLm\TRn)
User designated Continuous transition preventer
transition condition SM324
Always ON
Data
Expansion
Constant Other
Type
SFC
K, H TRn
BLm\TRn
Device
name
Tran
Ladder resulting from execution of SET instruction
Programs Using Instructions
SFC Program
Sequence
Block Step
Program
Transition
Step
Condition
RST D (TRn)
RST D (BLm\TRn)
Execution Site
Transition
Condition
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