Danfoss VLT AQUA Instruction Manual page 147

VLT AQUA High Power Instruction Manual
22-43 Wake-up Speed [Hz]
Range:
Application [Application dependant]
dependent*
22-44 Wake-up Ref./FB Difference
Range:
10%* [0-100%]
22-45 Setpoint Boost
Range:
0 %* [-100 - 100 %]
22-46 Maximum Boost Time
Range:
60 s* [0 - 600 s]
22-50 End of Curve Function
Option:
[0] * OFF
[1] Warning
[2] Alarm
[3]
NOTE!
Automatic restart will reset the alarm and start the system again.
Function:
Function:
Only to be used if par. 1-00, Configuration Mode
troller is used for controlling the pressure.
Set the pressure drop allowed as a percentage of the setpoint for the pressure (Pset) before can-
celing sleep mode.
NOTE!
If used in application where the integrated PI controller is set for inverse control
PID, Normal/Inverse Control
in par. 20-71,
tomatically be added.
Function:
Configuration Mode
Only to be used if par. 1-00
troller is used. For example, in systems with constant pressure control, it is advantageous to increase
the system pressure before the motor is stopped. This will extend the time during which the motor
is stopped and help to avoid frequent start/stop.
Set the desired over pressure/temperature as a percentage of the setpoint for the pressure (Pset)/
temperature before entering sleep mode.
If set at 5%, the boost pressure will be Pset*1.05. The negative values can be used, for example,
for cooling tower control, where a negative change is needed.
Function:
Only to be used if par. 1-00 Configuration Mode
is used for controlling the pressure.
Set the maximum time for which boost mode will be allowed. If the set time is exceeded, sleep
mode will be entered and will not wait for the set boost pressure to be reached.
Function:
End of Curve monitoring not active.
A warning is issued in the display [W94].
An alarm is issued and the adjustable frequency drive trips. A message [A94] appears in the display.
®
MG.20.P3.22 - VLT is a registered Danfoss trademark
5 How to program the adjustable frequency
, is set for closed-loop and the integrated PI con-
, the value set in par. 22-44 will au-
, is set for closed-loop and the integrated PI con-
is set for closed-loop and the integrated PI controller
drive
5
5-41