Internet PLC Forum
General => Technical support => Topic started by: jurg1505 on August 30, 2014, 05:12:05 AM
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The ADC of the FMD 88-10 is not measuring, ADC 1-8.
The plc stopt measuring the analog inputs.
When i put a voltage between 0-4V on the inputs the adc stays 0v.
Grounds are connected.
What can be wrong ?
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ADC() function MUST BE RUN in order to show up on the View Variable screen.
Remember that the ADC #1 is on Pin 8 of the DB15 connector (female). ADC #2 on Pin 7.... ADC #8 on pin 1. So please check that you apply to the correct pin.
Run a simple FOR loop to read ALL 8 ADC channels so that you can see which ADC is being energized:
FOR I = 1 to 8
DM = ADC(I)
NEXT
ADC() function MUST BE RUN in order to show up on the View Variable screen.