rta53
Lifetime Supporting Member
I have a need to control the speed of a pump using two different control scenarios. The hardware is an AB CompactLogix with Studio5000 V30.
Normally the pump is controlled based on the discharge pressure as the control variable with a single set point. However, when a carbon filter is backwashing, they want me to control the pump based on flow as the control variable, with two different set points, one for backwash and one for rinse. I'm guessing I will need to use two PID instructions and enable the appropriate one as needed. What would be the cleanest way to do this?
Normally the pump is controlled based on the discharge pressure as the control variable with a single set point. However, when a carbon filter is backwashing, they want me to control the pump based on flow as the control variable, with two different set points, one for backwash and one for rinse. I'm guessing I will need to use two PID instructions and enable the appropriate one as needed. What would be the cleanest way to do this?