22-77 Minimum Run Time
Range: Function:
0 s* [0 - par. 22-76 s] 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).
The timer will be overridden by a Coast (Inverse) or an External Interlock command.
NOTE!
Does not work in cascade mode.
3.20.7 22-8* Flow Compensation
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.
H
DESIGN
(Required pressure) is the setpoint for closed-loop (PI) operation of the adjustable frequency drive and is set as for closed-loop operation without
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:
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C6.22 - VLT
®
is a registered Danfoss trademark
3-207
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