???Hi
I am using a T100MD 888 plc tring to read an analog temperature sensor with 4 to 20 mini amp output.
I connect the sensor to analog #1 according to the T100MD888 user manual.
Hower, when I check the voltage at channel 1, it is always 9 volt regardless of the temperature change.
When I isolate the sensor from the PLC, the output of the sensor is 0 to 4 volt and current is well within 4 to 20 mA.
When I connect the sensor ouput to the PLC, the volage at the input channle #1 is always 9v.
Could this be a current loading problem. please help
Thanks