List Of Sfc Diagram Symbols - Mitsubishi Electric MELSEC-Q Series Programming Manual

4.1

List of SFC Diagram Symbols

The symbols used in the SFC program are listed below.
Class Name
Step Initial step
Dummy initial step
Coil HOLD initial step
Operation HOLD step (without transition check)
initial step
Operation HOLD step (with transition check)
initial step
Reset initial step
Initial step
Dummy initial step
Coil HOLD initial step
Operation HOLD step (without transition check)
initial step
Operation HOLD step (with transition check)
initial step
Reset initial step
Step
Dummy step
Coil HOLD step
Operation HOLD step (without transition check)
Operation HOLD step (with transition check)
Reset step
Block START step (with END check)
Block START step (without END check)
End step
SFC Diagram Symbol
When step No. is "0"
When initial step No.
is other than "0"
Steps other than
"initial" step
Remarks
Any of these steps in 1 block
Initial step at top left (column 1) of
SFC diagram is fixed to No. 0.
n = reset destination step No.
Up to 31 steps in 1 block.
i = step No. (1 to 511)
n = reset destination step No.
Up to 512 steps in 1 block, including
initial step (128 steps for Basic
model QCPU)
i = step No. (1 to 511)
n = reset destination step No.
m = movement destination block No.
More than one step can be used in 1
block.
4 SFC PROGRAM CONFIGURATION
4.1 List of SFC Diagram Symbols
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