Number Of Steps Required For Expressing The Sfc Diagram As Sfc Dedicated Instructions - Mitsubishi Electric MELSEC-Q Series Programming Manual

Number of steps required for expressing the SFC diagram as SFC
dedicated instructions
The following table shows the number of steps required for expressing the SFC diagram as SFC dedicated instructions.
Name Ladder
Expression
SFCP START instruction [SFCP]
SFCP END instruction [SFCPEND]
Block START instruction [BLOCK BLm]
Block END instruction [BEND]
Step START instruction [STEP Si]
Transition START [TRAN TRj]
instruction
Coupling check [TAND Si]
instruction
Transition designation [TSET Si]
instruction
Step END instruction [SEND]
Number of Description
Steps
1 Indicates the SFC program START
1 Indicates the SFC program END
1 Indicates the block START
1 Indicates the block END
2 Indicates the step START ("  " varies
according to the step attribute)
2 Indicates the transition START ("  " varies
according to the step attribute)
2 "Coupling completed" check occurs at parallel
coupling
2 Designates the transition destination step
1 Indicates the step / transition END
Required Number of Steps
1 per program
1 per program
1 per block
1 per block
1 per step
1 per transition condition
"[Number of parallel couplings] - [1]"
per parallel coupling
For serial transitions and selection
transitions, 1 per transition condition;
for parallel branching transitions, the
number of steps is the same as the
number of parallel couplings
1 per step
3 SPECIFICATIONS
3.4 Calculating the SFC Program Capacity
3
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