I'm developing lead/lag pump interlock sequencing for 5 pumps. If pressure falls below pre-determined limit then Lag pumps will start to stop in 120 second increments. If any lag pump is stopped then it should trip next running pump.
For example:
Lag4 - Running
Lag3 - Stopped
Lag2 - Running - In this scenerio Lag4 should go out at 120 secs
Lag3 no action
Lag2 should go out at 240 secs.
Operator do change sequencing on pumps. In my program Lag2 stops at 360 secs instead at 240.
Any suggestions on how to do this?
Thanks,
For example:
Lag4 - Running
Lag3 - Stopped
Lag2 - Running - In this scenerio Lag4 should go out at 120 secs
Lag3 no action
Lag2 should go out at 240 secs.
Operator do change sequencing on pumps. In my program Lag2 stops at 360 secs instead at 240.
Any suggestions on how to do this?
Thanks,