Internet PLC Forum

How long does the PULSEFREQUENCY need to measure frequency?  I am having trouble executing it within a sequence, even with 4 second clocks being used.  It works fine if I just call it outside the sequence.  It really messes up the sequence counter whenever this function is called.  What I am trying to do is mux more than two flow sensors (5hz to 120hz signals) into the two pulse inputs, turning them on and off externally, then reading them sequentually.  It just won't work this way.  I need a suggestion on a workaround.

Thanks,

Doug