travisroberts88
Lifetime Supporting Member
I have a project coming up where I need to control the speed of my 5HP pump using a Powerflex 525 with a Pressure Sensor that is 4-20mA. What I am having difficulty with is setting up the PID Loop to control the pump speed where if it sees the 4mA it will run the pump faster to send more product through (In this application Hot water). and at 20mA the pump slows down in order to maintain a set point. I have an ifm electronic pressure sensor (PG2454 to be exact). At the moment I am running Pin 1 (brown) to +24vdc, pin 2 (white) to my 4-20mA IN on my 525, and 3 (blue) to +24common. on the 525 the terminals are 14 and 15 for the 4-20mA input and the common. I am not super familiar with the parameters in the Powerflex 525 to know what I need to set and to what value or if I am even on the right terminals. Any help would be greatly appreciated, PM if needed. The process is being heated with a Yokogawa controller for my heat set point. I have a closed loop of RO water that I am just using a set Hz rating on my first drive. I then add Well Water into the mix to go into the plant that needs to be maintained at 135F. This part is not the issue. I have the pressure sensor in and I cannot get the PID to control the Hz of the drive to adjust depending on the pressure. I need all the help I can get to try and get this to work. I am awful with PID as I don't fully understand how to tune it in in the first place in the 525 application. Thanks in advance!