When a 4-20mA analog sensor feeds a value back to the PLC on an analog input, this is transformed into PLC points and varies between 0 and 10,000 points (SCHNEIDER specific) depending on the state of the physical quantity measured ( 0 and 27648 points for SIEMENS).
We must therefore convert the value in PLC points to a real usable value.
In our application we use PT100 temperature probes whose output signal is not between 0-20mA.
Therefore, in order to calculate the scaling coefficients, it will be necessary to perform physical measurements on the sensor.
