Issue
How do I logically determine the first Task Cycle in a SoMachine or EcoStruxure Machine Expert PLC?
Product Line
SoMachine (Versions: v2.0, v3.1, v4.0, v4.1, v4.2, v4.3)
- PLCs: M238, M258, HMISCU
EcoStruxure Machine Expert (Versions: v1.1, v1.2.x, v2.0, v2.1)
- PLCs: HMISCU, M241, M251, M262
Environment
PLC programming software for Windows PC -> Logic Builder -> POU program
Resolution
The functions "IsFirstMastColdCycle" and "IsFirstMastCycle", is True during the first MAST task cycle after a start.
For example, with this small program in Structured Text:
(a and b are INT variables)IF IsFirstMastColdCycle()
THEN
a := a + 1;
END_IF
IF IsFirstMastCycle()
THEN
b := b + 1;
END_IF
Result:
The value of "a" will be 1 the first time that the PLC starts (Cold Start).
The value of "b" will increments each time that the PLC stops and starts (Warm Start).
If this FAQ did not solve your issue, you can chat with us at chat with us or e-mail us at customer.services@se.com to create a case with our Technical Support Team.
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Released for: Schneider Electric Singapore
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