It is sometimes the case that it is not possible for a pressure transducer to be placed at a remote point in the system and it can only be located close to

the fan/pump outlet. Flow compensation operates by adjusting the setpoint according to the output frequency, which is almost proportional to flow, thus

compensating for higher losses at higher flow rates.

(Required pressure) is the setpoint for closed-loop (PI) operation of the adjustable frequency drive and is set as for closed-loop operation without

DESIGN

flow compensation.

It is recommended to use slip compensation and RPM as unit.

NOTE!

When flow compensation is used with the cascade controller (parameter group 25-**), the actual setpoint will not depend on speed

(flow) but on the number of pumps cut in. See below:

Function:

Sets the time desired as minimum run time after a normal start command (Start/Jog/Freeze). Any

normal stop command will be disregarded until the set time has expired. The timer will start counting

following a normal start command (Start/Jog/Freeze).