Function Calls in Step7

OK farmboy_jon, you're right. It is correct. And it is one of the most efficient ways to initialize certain variables, since you can influence 32 bits with only 2 lines of code. You mostly see it in OB100 (for S7-300/400), OB101 (for S7-400) and (although restricted to 16 bits) in OB's 20 to 22 for the S5 family.

Kind regards,

Jean Pierre Vandecandelaere
Instructor PLC - SCADA
 

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