RSlogix 5000 PID Scaling

Hi,

This is our first time using the PID block in RSL5000. For simplicity sake, we have the CV and PV tied to an analog output and input respectively. Both are scaled 4-20 in engineering units (4000 to 20000).

In the PID block are inputs for CV Low Limit and CV High Limit. Should these be in % or should these match the 4000 and 20000 range of the analog output?

Thanks in advance for any help.

OK, I think I found what I'm looking for in the scaling tab of the pid. Does this sound right?

They are in the scaled units.

Read Logix5000 Controllers General Instructions Reference Manual, page 507+:

http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1756-rm003_-en-p.pdf