Danfoss VLT AQUA Programming Manual page 53

®
VLT AQUA Drive Programming Guide
2.3.7. 1-8* Stop Adjustments
Parameters for setting special stop features for the motor.
1-80 Function at Stop
Option:
*
[0]
*
[1]
1-81 Min Speed for Function at Stop [RPM]
Range:
3 RPM
1-82 Min Speed for Function at Stop [Hz]
Range:
0.0 Hz
2.3.8. 1-9* Motor Temperature
Parameters for setting the temperature protection features for the motor.
1-90 Motor Thermal Protection
Option:
[0]
[1]
Function:
Select the frequency converter function after a stop command
or after the speed is ramped down to the settings in par. 1-81
Min Speed for Function at Stop [RPM]
Coast Leaves motor in free mode.
DC hold/Preheat Energizes motor with a DC holding current (see par. 2-00).
Function:
* [0 - 600 RPM] Set the speed at which to activate par. 1-80
Function:
* [0.0 - 500 Hz] Set the output frequency at which to activate par. 1-80
at stop
Function:
The frequency converter determines the motor temperature for
motor protection in two different ways:
No protection If the motor is continuously overloaded and no warning or trip
of frequency converter is wanted.
Thermistor warning Activates a warning when the connected thermistor in the motor
reacts in the event of motor over-temperature.
®
MG.20.O2.02 - VLT is a registered Danfoss trademark
.
• Via a thermistor sensor connected to one of the analog
or digital inputs (par. 1-93
• Via calculation (ETR = Electronic Thermal Relay) of the
thermal load, based on the actual load and time. The
calculated thermal load is compared with the rated
motor current I and the rated motor frequency
M,N
f . The calculations estimate the need for a lower
M,N
load at lower speed due to less cooling from the fan
incorporated in the motor.
2. Parameter Description
.
Function at stop
.
Function
Thermistor Source
).
2
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