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VLT
®
HVAC Drive Programming Guide
22-37 High Speed [Hz]
Range:
0.0 Hz*
[0.0 - par. 4-14 Hz]
22-38 High Speed Power [kW]
Range:
0 kW*
[0.00 - 0.00 kW]
22-39 High Speed Power [HP]
Range:
0 hp*
[0.00 - 0.00 hp]
3.20.3 22-4* Sleep Mode
If the load on the system allows for stop of the motor and the load is monitored, the motor can be stopped by activating the sleep mode function. This
is not a normal stop command, but ramps the motor down to 0 RPM and stops energizing the motor. When in sleep mode, certain conditions are monitored
to find out when load has been applied to the system again.
Sleep mode can be activated either from the No Flow Detection/Minimum Speed Detection (must be programmed via parameters for No-Flow Detection,
see the signal flow diagram in parameter group 22-2*, No-Flow Detection) or via an external signal applied to one of the digital inputs (must be pro-
grammed via the parameters for configuration of the digital inputs, par. 5-1* selecting [66] Sleep Mode). Sleep mode is activated only when no wake-
up conditions are present.
To make it possible to use, for example, an electro-mechanical flow switch to detect a no flow condition and activate sleep mode, the action takes place
at raising edge of the external signal applied (otherwise, the adjustable frequency drive would never come out of sleep mode as the signal would be
steady connected).
NOTE!
If sleep mode is to be based on No Flow Detection/Minimum Speed, remember to choose Sleep Mode [1] in par.22-23
tion
.
Destage At No-Flow
If par.25-26
is set for Enabled, activating sleep mode will send a command to the cascade controller (if enabled) to start de-staging
lag pumps (fixed speed) before stopping the lead pump (variable speed).
When entering sleep mode, the lower status line in the Local Control Panel shows Sleep Mode.
Function:
To be used if par.0-02
Motor Speed Unit
Set used speed for the 85% level.
The function is used for storing values needed to tune No-flow Detection.
Function:
To be used if par.0-03
Regional Settings
North America selected).
Set power consumption to 85% speed level.
This function is used for storing values needed to tune No-flow Detection.
Function:
To be used if par.0-03
Regional Settings
International selected).
Set power consumption to 85% speed level.
This function is used for storing values needed to tune No-flow Detection.
MG.11.C6.22 - VLT
®
is a registered Danfoss trademark
3 Parameter Description
has been set for Hz (parameter not visible if RPM selected).
has been set for International (parameter not visible if
has been set for North America (parameter not visible if
3
No-Flow Func-
3-201
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