Danfoss vlt aqua, Инструкция

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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 overpressure/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 The drive will continue to run, but activate a End of Curve warning [W94]. A drive digital output or
a serial communication bus can communicate a warning to other equipment.
[2] Alarm The drive will stop running and activate a End of Curve alarm [A 94]. A drive digital output or a
serial communication bus can communicate an alarm to other equipment.
[3] Man. Reset Alarm The drive will stop running and activate a End of Curve alarm [A 94]. A drive digital output or a
serial communication bus can communicate an alarm to other equipment.
NOTE!
Automatic restart will reset the alarm and start the system again.
NOTE!
Do not set par. 14-20
Reset Mode
, to [13] Infinite auto reset when par. 22-50
End of Curve Function
is set to [2] Alarm. Doing so will
cause the drive to continuously cycle between running and stopping when a End of Curve condition is detected.
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’s automatic bypass function, if [2] Alarm or [3] Man. Reset Alarm is selected
as the End of Curve Function.
VLT AQUA Low Harmonic Drive Instruction
Manual 6 How to Program the Low Harmonic Drive
MG.20.T1.22 - VLT
®
is a registered Danfoss trademark
6-39
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