Stop Adjustments; Motor Temperature; Min. Speed For Function At Stop [Hz]; Motor Thermal Protection - Danfoss VLT FC 51 Series Programming Manual

VLT Micro Drive FC 51

4.2.6. 1-8* Stop Adjustments

To meet the need for various stop functions in different application these parameters offer some
special stop features for the motor.
1-80 Function at Stop
Option:
*
[0]
[1]

1-82 Min. Speed For Function at Stop [Hz]

Range:
0.0 Hz

4.2.7. 1-9* Motor Temperature

With an estimated motor temperature monitor the frequency converter is able to estimate motor
temperature without having a thermistor mounted. It is thus possible to receive a warning or an
alarm, if motor temperature exceeds upper operational limit.

1-90 Motor Thermal Protection

Option:
*
[0]
[1]
Function:
The selected function at stop is active in following situations:
Coast The inverter is coasted.
DC hold The motor is energized with a DC current. See par. 2-00
Current
Function:
* [0.0 - 20.0 Hz] Set the speed at which to activate par. 1-80
Function:
Using ETR (Electronic Terminal Relay) the motor temperature is
calculated based on frequency, speed and time. Danfoss rec-
ommends using The ETR function, if a thermistor is not present.
No Protection Disables temperature monitoring.
Thermistor Warning A thermistor connected to either digital or analog input gives a
warning if upper limit of motor temperature range is exceeded,
(see par. 1-93,
MG.02.C2.02 - VLT ® is a registered Danfoss trademark
• Stop command is given and output speed is ramped
down to Min. Speed for Activating Functions at Stop
• Start command is removed (standby), and output
speed is ramped down to
Functions at Stop
.
• DC-brake command is given, and DC-brake time has
passed
• While running and calculated output speed is below
Min. Speed for Activating Functions at Stop
for more information.
NB!
ETR calculation is based on motor data from group
1-2*.
Thermistor Resource)
4. Parameter Descriptions
.
Min. Speed for Activating
.
DC Hold
Function at Stop
.
.
4
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