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7 How to Program the Adjustable Frequency
Drive
NOTE!
If the drive is equipped with a constant speed bypass with an automatic bypass function that starts the bypass if the drive experiences
a persistent alarm condition, be sure to disable the bypass' automatic bypass function, if [2] Alarm or [3] Man. Reset Alarm is selected
as the dry pump function.
22-27 Dry Pump Delay
Range:
10 s*
[0 - 600 s]
22-40 Minimum Run Time
Range:
10 s*
[0 - 600 s]
22-41 Minimum Sleep Time
Range:
10 s*
[0 - 600 s]
7
22-42 Wake-up Speed [RPM]
Range:
Application
[Application dependant]
dependent*
22-43 Wake-up Speed [Hz]
Range:
Application
[Application dependant]
dependent*
22-44 Wake-up Ref./FB Difference
Range:
10 %*
[0 - 100 %]
NOTE!
If used in application where the integrated PI controller is set for inverse control (e.g., cooling tower applications) in par. 20-71
Performance
7-44
Function:
Defines for how long the Dry Pump condition must be active before activating Warning or Alarm
Function:
Set the desired minimum running time for the motor after a start command (digital input or bus)
before entering sleep mode.
Function:
Set the desired minimum time for staying in sleep mode. This will override any wake-up conditions.
Function:
Function:
Function:
Only to be used if par. 1-00
is used for controlling the pressure.
Set the pressure drop allowed in percentage of setpoint for the pressure (Pset) before canceling the
sleep mode.
, the value set in par. 22-44
Wake-up Ref./FB Difference
MG.11.AB.22 - VLT
VLT
®
Configuration Mode
is set for closed-loop and the integrated PI controller
will automatically be added.
®
is a registered Danfoss trademark
HVAC Drive Instruction Manual
PID
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