ELake20
Lifetime Supporting Member
Hi guys,
Need some help.
Goal:
Closed loop flow control of valve positioner to a flow value.
Parts:
I've got a K series Rotork valve with SIPART PS2 valve positioner (I/P) that accepts a 4-20mA command.
I can send the valve a command and it responds so no problems there.
My problem is when I attempt to enter closed loop. When PV = SP the output is reduced to 4mA so the valve then closes. Once the deviation is sensed the process repeats itself.
I am using the base PID instruction for AB CLX.
Am I missing something really simple here or is this not the correct application of this?
I have considered using the PIDE instruction but I don't see what I would gain.
I have poured over the manuals and cannot seem to find any resolution. I'm sure this has come up before?
Thanks in advance
Need some help.
Goal:
Closed loop flow control of valve positioner to a flow value.
Parts:
I've got a K series Rotork valve with SIPART PS2 valve positioner (I/P) that accepts a 4-20mA command.
I can send the valve a command and it responds so no problems there.
My problem is when I attempt to enter closed loop. When PV = SP the output is reduced to 4mA so the valve then closes. Once the deviation is sensed the process repeats itself.
I am using the base PID instruction for AB CLX.
Am I missing something really simple here or is this not the correct application of this?
I have considered using the PIDE instruction but I don't see what I would gain.
I have poured over the manuals and cannot seem to find any resolution. I'm sure this has come up before?
Thanks in advance