Danfoss FC 300 Programming Manual page 63

Parameter Descriptions
4-16 Torque Limit Motor Mode
Range:
Application [Application This function limits the torque on
dependent dependant] the shaft to protect the mechanical
*
installation.
A drop in motor magnetisation is
automatically compensated by an
increase in current to maintain
motor magnetisation.
NOTE
Changing par. 4-16 Torque Limit Motor Mode when
par. 1-00 Configuration Mode is set to Speed open loop
[0], par. 1-66 Min. Current at Low Speed is automatically
readjusted.
NOTE
The torque limit reacts on the actual, non-filtrated
torque, including torque spikes. This is not the torque
that is seen from the LCP or the Fieldbus as that is
filtered.
4-17 Torque Limit Generator Mode
Range: Function:
100.0 % [Application This function limits the torque on the
*
dependant] shaft to protect the mechanical installa-
tion.
A drop in motor magnetisation is
automatically compensated by an
increase in current to maintain motor
magnetisation.
NOTE
The torque limit reacts on the actual, non-filtrated
torque, including torque spikes. This is not the torque
that is seen from the LCP or the Fieldbus as that is
filtered.
4-18 Current Limit
Range: Function:
Application [Applica- This is a true current limit function
dependent tion depend- that continues in the oversynchronous
*
ant] range, however due to field weaken-
ing the motor torque at current limit
will drop accordingly when the
voltage increase stops above the
synchronised speed of the motor.
FC 300 Programming Guide
Function:
®
MG.33.M9.02 - VLT is a registered Danfoss trademark
4-19 Max Output Frequency
Range: Function:
132.0 [1.0 - Provides a final limit on the output
Hz 1000.0 Hz] frequency for improved safety in applica-
*
tions where you want to avoid accidental
over-speeding. This limit is final in all
configurations (independent of the setting
in par. 1-00 Configuration Mode).
NOTE
Max. output frequency cannot exceed 10% of the
inverter switching frequency (par. 14-01 Switching
Frequency).
Par. 4-19 Max Output Frequency cannot be adjusted while the
motor is running.
4-20 Torque Limit Factor Source
Option: Function:
Select an analog input for scaling the
settings in par. 4-16 Torque Limit Motor
Mode and par. 4-17 Torque Limit Genera-
tor Mode from 0% to 100% (or inverse).
The signal levels corresponding to 0%
and 100% are defined in the analog
input scaling, e.g. par. group 6-1*. This
parameter is only active when
par. 1-00 Configuration Mode is in Speed
Open Loop or Speed Closed Loop.
[0] No function
*
[2] Analog in 53
[4] Analog in 53 inv
[6] Analog in 54
[8] Analog in 54 inv
[10] Analog in X30-11
[12] Analog in X30-11
inv
[14] Analog in X30-12
[16] Analog in X30-12
inv
4-21 Speed Limit Factor SourceOption
Option: Function:
Select an analog input for scaling
the settings in par. 4-19 from 0% to
100% (or vice versa). The signal
levels corresponding to 0% and
100% are defined in the analog
input scaling, e.g. par. group 6-1*.
This parameter is only active when
par. 1-00 Configuration Mode is in
Torque Mode.
[0] No function
*
[2] Analog input 53
[4] Analog input 53 inv
[6] Analog input 54
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