J
I've read with interest all of the comments for PID Loops under 'Thermal Overload'. Most relate however to identifying the appropriate tuning constants for individual standalone controllers. Good questions and comments.
What if tuning is not the problem ? What if for example, a group of loops are cycling together, or two loops are interacting ? What if a control valve I fixed last week suddenly begins to stick ? What if my operators are messing around (frequent mode changes, tuning changes) with the controllers on nightshift. I've got all of the these problems and all of these conditions impact how my plant operates. How do I identify conditions like these in real time if I've got 2500+ control loops in the plant ?
I've read a couple papers on the subject and I'm wondering what other companies experiences have been with some of the commercial controller performance assessment packages that are now available on the market ? Which ones have you used ? Have you been able to measure an ROI ?
JR
P.S. I've posted a similar question under Process Control
What if tuning is not the problem ? What if for example, a group of loops are cycling together, or two loops are interacting ? What if a control valve I fixed last week suddenly begins to stick ? What if my operators are messing around (frequent mode changes, tuning changes) with the controllers on nightshift. I've got all of the these problems and all of these conditions impact how my plant operates. How do I identify conditions like these in real time if I've got 2500+ control loops in the plant ?
I've read a couple papers on the subject and I'm wondering what other companies experiences have been with some of the commercial controller performance assessment packages that are now available on the market ? Which ones have you used ? Have you been able to measure an ROI ?
JR
P.S. I've posted a similar question under Process Control