Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 91

It is possible to correspond the controls of the entire facility, mechanical devices of each station, and all machines to the
blocks and steps of the SFC program on a one-to-one basis.
Step transition
control unit for
overall process
Step transition control unit for
overall process (Block 0)
Transfer machine start
(Initial step)
Station 1 start
(Block 1 start)
Station 2 start
Repeated
(Block 2 start)
Station 3 start
(Block 3 start)
End (End step)
Station 1
control unit
Transfer machine
Overall process
(SFC program)
Station 1 control unit Station 2 control unit
(Block 1) (Block 2)
Start
(Initial step)
Pallet clamping
(Step 1)
Hole making
(Step 2)
Pallet unclamping
(Step 3)
(End step)
Station 2 Station 3
control unit control unit
Station 3 control unit
(Block 3)
Start
(Initial step)
Pallet clamping
(Step 1)
Tapping
(Step 2)
Pallet unclamping
(Step 3)
(End step)
Start
(Initial step)
Pallet clamping
(Step 1)
Workpiece unloading
(Step 2)
Pallet unclamping
(Step 3)
(End step)
8 SFC PROGRAM
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