to detect the meter output via the parallel port

I need to detect the meter count trigger, to perform an operation every time. I think passing the input signal pins (pins of status or control). The meter uses is omron H7EC.

I lowered the voltage of 24 V to 5 v with resistors.

But I can't get the entry via the parallel port.

All the stems of my status are still high.

What should I do, please help.

In the parallel reading write loop.VI, the splash screen is attached.

I suspect the entries on the parallel port pins have a resistance low pullup to 5V, so they tend to float high (logic 1).

Try to add a 4 700 Ohm resistor between pins of entry and mass of the parallel port, see if it then reads down pulldown (logic 0). If so, then keep the resistance in place and connect the signal of 5V that you want to monitor at the entrance.

-AK2DM

Tags: NI Hardware

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