Jason_G

@Michael Walsh Thank you

Yes I did. Here is the .cxp file PROJECT TWO - Single Loop Tank Level Control.cxp

@Michael Walsh, I just still cant get it to work. I really don't know what I am doing wrong. Please can you run the program for me and highlight my exact errors. Its actually part of a school project and the due date is getting close FINAL PROJECT - Single Loop Tank Level Control.bak FINAL PROJECT - Single Loop Tank Level Control.cxp FINAL PROJECT - Single Loop Tank Level Control.opt PROJECT TWO - Single Loop Tank Level Control.cxp PROJECT TWO - Single Loop Tank Level Control.opt

Hi Guys, After trying the above settings for the PID parameters I still cant get the PID to work as it should.  I have attached the program I written can someone take a look at it for me and help me identify where am going wrong? Tank Level Program.cxp

Thanks @Michael Walsh, this seems pretty much clearer to me. I will try it and see what happens.

Hi everyone I have seen and read many of the post here on PID. But I am still not understanding some of the parameters especially the ones for C+6 to C+9. Could someone stage an example and explain it in some details. For example if I convert and scale a PV value of 4-20mA to a  value of 0000 to 0100 in BCD to the PV of the PID and my.  VFD takes in a 4-20mA from the AO of my PLC and I know that in the VFD I can set it up to convert the mA signal to rpm within the VFD. I just need the know how to set the PID to take the PV compare it to a SV and output the appropriate value for me to use