sparkytex
Lifetime Supporting Member
I just programmed a PID control system for a VFD to control header pressure for our weak liquor pump to our evaporators. I tested out all the motor control logic as well as tested the adjustment registers for the the set point and output logic with the Delta-V HMI. At this point I did not have the PID enabled because I was not ready for it. As soon as I enabled "B3:1/0" which enables the rung to the PID the Processor Faulted and it damn near took the Evaporators down. I attached the program so you guys could have a look and see what mistake I have obviously made. Please help as I'm expected to commission this system tomorrow afternoon.
Thanks, Tex
** edit, I noticed that the process variable for the PID I used is also used at the PV for another PID and I also had forgot to set the Update time for the PID. I don't know if this helps but I thought I'd try.
Thanks, Tex
** edit, I noticed that the process variable for the PID I used is also used at the PV for another PID and I also had forgot to set the Update time for the PID. I don't know if this helps but I thought I'd try.
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