If pressure increases above the setpoint, last started vfd should reduce rpm and shut down first

Hi all

i have a project the multiple pump running and i was searching and found this but its for one pump at a time.

we start sequence in auto, the least run hour vfd should start first and increase the frequency slowly to maintain the pressure setpoint, now if vfd1 at 50hz and pressure is lower then the SP next vfd according to run hour should start and and increase frequency slowly, afterwords 3rd vfd according to runhour and so on untill pressure match SP, then maintain the pressure of header...

If pressure increases above the setpoint, last started vfd should reduce rpm and shut down first and then second last started to shutdown and so on...

Can any one help me with this, which will be very helpful for my project. thank You.

------------------------------------------------------------------------------------------
Split from Help with Understanding a SCL code for 4xMotor Hour comparing.

Closed cause question posted twice.

The second thread with the subject Water Pumping Station: works by its Run Hours and controlled by the Flow Demand. is published within the conference Industrial Software general.