jtashaffer
Member
I have a 1756-IF16 Analog Input Module. It is setup for Differential Mode. I am trying to read the 4ma to 20ma signal from a flow meter. I am using a SCP instruction.Range is 4mA=0 and 20mA=162. I have it wired to Channel 4. The positive is wired to IN-8 and The negative is wired to IN-9 with the jumper to iRTN-8. When I had the jumper installed it would give me a negative input data of -40.48728. The output data after scaling is -40.909935. When I remove the jumper the input data goes positive to 167.89609. The output data after scaling is -38.800053. I cant make the data match the data on the flow meter. Any Ideas?