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Hello. I have --[P]-- and POS. Which one of these is a p_trig?

P_TRIG is an instruction in Siemens S7 PLCs that is used to detect the positive edge of a signal. It outputs a TRUE signal when the input signal transitions from LOW to HIGH.

--[P]-- is a placeholder for a parameter in a function block or instruction. It is not an instruction itself.

POS is an instruction in Siemens S7 PLCs that is used to detect the positive position of a pulse train. It outputs a TRUE signal when the pulse train is at the positive edge.

Therefore, the answer to your question isPOS.