T100MD+ as tacho/pulsefrequency

[CMS]

I am trying to configure my T100MD+888 to take an input from a hall effect sensor providing a square wave output.

The first line of my program has the " first scan" bit and then a fuction box where " PMON 3" is written.

The second line has the "clock 0.05s" bit and then function box where "DM[1] = PULSEFREQUENCY (3)" is written

When I write to the PLC and test the DM[1] value is always at zero, i have a few different inputs ie dig in 3 pulsed straight to ground instead of using the sensor, but nothing works

I am pressuming I am not programming it correctly.

Can anyone suggest anything?

Thanks

[support]

try PMON 1, not PMON 3. Frequency measurement channel 1 is mapped to input #3. See page 1-2  of your user's manual for details.

[CMS]

Thanks

That did the trick