Danfoss vlt aqua User Manual

22-43 Wake-up Speed [Hz]
Range: Function:
Application
dependent*
[Application dependant]
22-44 Wake-up Ref./FB Difference
Range: Function:
10%* [0-100%] Only to be used if par. 1-00, Configuration Mode , is set for closed-loop and the integrated PI con-
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
in par. 20-71,
PID, Normal/Inverse Control , the value set in par. 22-44 will au-
tomatically be added.
22-45 Setpoint Boost
Range: Function:
0 %* [-100 - 100 %] Only to be used if par. 1-00 Configuration Mode , is set for closed-loop and the integrated PI con-
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.
22-46 Maximum Boost Time
Range: Function:
60 s* [0 - 600 s] Only to be used if par. 1-00 Configuration Mode is set for closed-loop and the integrated PI controller
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.
22-50 End of Curve Function
Option: Function:
[0] * OFF End of Curve monitoring not active.
[1] Warning A warning is issued in the display [W94].
[2] Alarm An alarm is issued and the adjustable frequency drive trips. A message [A94] appears in the display.
[3]
NOTE!
Automatic restart will reset the alarm and start the system again.
VLT AQUA High Power Instruction Manual
5 How to program the adjustable frequency
drive
MG.20.P3.22 - VLT
®
is a registered Danfoss trademark 5-41
5

Danfoss vlt aqua Specifications

General

Supply Voltage	200-240V, 380-500V, 525-600V
Enclosure	IP20
Features	Energy optimization
Approvals	CE, UL, cUL
Input Voltage Range	200-240V, 380-500V, 525-600V
Output Voltage Range	0 to supply voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Short circuit, Ground fault
Communication Interfaces	PROFIBUS
Cooling Method	Air-cooled