I am setting up control for Hypochlorite dosing. The easy part is the dosing calculation for flow pacing but I would also like to setup trimming with a PID controller. We have an analyzer to measure the PPM of chlorine and I want to use this to lower/raise the dose as needed. The hard part is the analyzers we use update the PV every 5 minutes.
My question is what is the best way to setup this trimming control for a PV that doesn't update but every 5 minutes?
Options I know about:
1) I recently learned about IMC in RSLogix5000 but I know nothing about it.
2) Really conservative tune for PID
3) Add/Subtract every time the PV changes by a predetermined amount.
Thanks in advance. Sorry If it takes me a minute to respond...going on vacation till Tuesday.
My question is what is the best way to setup this trimming control for a PV that doesn't update but every 5 minutes?
Options I know about:
1) I recently learned about IMC in RSLogix5000 but I know nothing about it.
2) Really conservative tune for PID
3) Add/Subtract every time the PV changes by a predetermined amount.
Thanks in advance. Sorry If it takes me a minute to respond...going on vacation till Tuesday.