Mitsubishi Electric MELSEC-Q Series Programming Manual page 93

Operation Error
Error code Description
4621 When the specified block does not exist or when the SFC program is in the stand-by status
Program Examples
• When X1 switches ON, the following program forcibly activates block 1. When X2 switches ON, it ends and forcibly
deactivates block 1.
■Related Instructions
SFC diagram symbols
• Block START step (Bm
step (without END check))
SFC information device
• Block START/END bit (Refer to  Page 106 Block START/END bit.)
, Bm ) (Refer to  Page 52 Block START step (with END check), Page 53 Block START
4.4 Controlling SFC Programs by Instructions (SFC Control Instructions)
4 SFC PROGRAM CONFIGURATION
4
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