Mitsubishi Electric MELSEC-Q Series Programming Manual page 71

Precautions on description
■Description of the instructions which do not require execution conditions (e.g. DI or EI)
Describe the instructions which do not require execution conditions (e.g. DI or EI) at the last of each operation output.
With the MELSAP-L, execution conditions like contacts cannot be created as the operation output. Therefore, the instruction
which requires execution conditions cannot be created after the instruction which exists individually and does not require
execution conditions.
• Example of proper description
MELSAP-L description
oY70, MOV D0 D100, DI
• Example of improper description
MELSAP-L description
DI, oY70, MOV D0 D100
■Instructions that can be described for one operation output
Up to 24 instructions can be described for one operation output.
• The timer continues measurement while the step is active.
• The instruction which requires execution conditions cannot be created between FOR and NEXT
instructions.
Transition condition program
■Transition condition program expression
The transition condition program is expressed as the following ladder circuit:
Circuit expression
Circuit expression
4 SFC PROGRAM CONFIGURATION
4
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4.3 Transition