Call instruction
- Thread starter vj5588
- Start date
call
Call ? Call function, function block ?
In stl:
UC FC10 = unconditional call, this calls the Function FC10 without conditions. The code in FC10 will be executed and then it comes back to resume the program.
Don't know what u don't understand... please explain more...
Call ? Call function, function block ?
In stl:
UC FC10 = unconditional call, this calls the Function FC10 without conditions. The code in FC10 will be executed and then it comes back to resume the program.
Don't know what u don't understand... please explain more...
uptown47
Lifetime Supporting Member
Hi Vj,
When the PLC goes into RUN mode it immediately calls OB1. You then 'call' other FCs (functions) and FBs (function blocks) from OB1 to direct the program flow.
So, for example, in OB1 you would have:
CALL FC 1
CALL FC 25
CALL FB 15, DB 20 (each FB needs an associated DataBlock)
HTH ;-)
When the PLC goes into RUN mode it immediately calls OB1. You then 'call' other FCs (functions) and FBs (function blocks) from OB1 to direct the program flow.
So, for example, in OB1 you would have:
CALL FC 1
CALL FC 25
CALL FB 15, DB 20 (each FB needs an associated DataBlock)
HTH ;-)
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