Mitsubishi Electric FX3G SERIES Programming Manual page 771

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Composite flows with branches and recombination
The single flow format is the fundamental style in process transfer control. Only single flow is sufficient in sequence
control for simple operations.
complicated conditions can be easily handled by using selective branches and parallel branches.
A branch for selectively processing many processes depending on a condition is called selective branch. A branch for
processing many processes at the same time is called parallel branch.
1. Selective branch
Either one among many flows is selected and executed.
2. Parallel branch
All of many flows are executed at the same time.
When various input conditions and operator manipulations intervene, however,
Branch state
relay
Recombination
state relay
Branch state
relay
Recombination
state relay
35 SFC Program and Step Ladder
35.1 SFC Program
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