Hey guys!!!
Im building a pressure chamber with automatic control. Im using a Micrologix 1100 with a 1762-IF2OF2 analog module to control 2 proportional valves that have a command signal of 4-20mA.
I have configured my PLC and my module to recieve a 0-10V analog signal from a pressure transmitter and control the valves through a PID instruction.
The problem im dealing with is the current signal. When the output value is 0 the reading i have is 0 mA instead of 4 mA. I have tested increasing the value from 0 and 16383 (Scaled value for PID) and the current output goes from 0 to 20 mA.
The module is working properly and I have to scale the value myself?? Or I have missed a configuration to make this module function form 4 to 20mA
Thanks very much for the help!!!
Im building a pressure chamber with automatic control. Im using a Micrologix 1100 with a 1762-IF2OF2 analog module to control 2 proportional valves that have a command signal of 4-20mA.
I have configured my PLC and my module to recieve a 0-10V analog signal from a pressure transmitter and control the valves through a PID instruction.
The problem im dealing with is the current signal. When the output value is 0 the reading i have is 0 mA instead of 4 mA. I have tested increasing the value from 0 and 16383 (Scaled value for PID) and the current output goes from 0 to 20 mA.
The module is working properly and I have to scale the value myself?? Or I have missed a configuration to make this module function form 4 to 20mA
Thanks very much for the help!!!