Danfoss VLT AutomationDrive FC 300 Programming Manual page 75

Parameter Descriptions
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 - 1000.0 %] This function limits the torque on the
*
shaft to protect the mechanical instal-
lation.
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:
Size [ 1.0 - This is a true current limit function that
related 1000.0 %] continues in the oversynchronous
*
range, however due to field weakening
the motor torque at current limit will
drop accordingly when the voltage
increase stops above the synchronised
speed of the motor.
NOTE
If [20] ATEX ETR is selected in 1-90 Motor Thermal Protection,
4-18 Current Limit current limit must be set to 150%.
4-19 Max Output Frequency
Range: Function:
Size [1 - 590 Provides a final limit on the output
related Hz] frequency for improved safety in
*
applications where you want to avoid
accidental over-speeding. This limit is
final in all configurations (independent
of the setting in 1-00 Configuration
Mode).
NOTE
Max. output frequency cannot exceed 10% of the inverter
switching frequency (14-01 Switching Frequency).
4-20 Torque Limit Factor Source
Option: Function:
Select an analog input for scaling the
settings in 4-16 Torque Limit Motor
Mode and 4-17 Torque Limit Generator
Mode from 0% to 100% (or inverse).
The signal levels corresponding to 0%
and 100% are defined in the analog
input scaling, e.g. parameter group
6-1* Analog Input 1. This parameter is
®
VLT AutomationDrive Programming Guide
4-20 Torque Limit Factor Source
Option:
[0]
[2]
[4]
[6]
[8]
[10] Analog in X30-11
[12] Analog in X30-11
[14] Analog in X30-12
[16] Analog in X30-12
4-21 Speed Limit Factor SourceOption
Option:
[0]
[2]
[4]
[6]
[8]
[10] Analog input X30-11
[12] Analog input X30-11
[14] Analog input X30-12
[16] Analog input X30-12
3.6.2 4-3* Motor Feedback Monitoring
The parameter group includes monitoring and handling of
motor feedback devices as encoders, resolvers etc.
4-30 Motor Feedback Loss Function
Option:
®
MG33MG02 - VLT is a registered Danfoss trademark
Function:
only active when 1-00 Configuration
Mode is in Speed Open Loop or Speed
Closed Loop.
No function
Analog in 53
Analog in 53 inv
Analog in 54
Analog in 54 inv
inv
inv
Function:
Select an analog input for scaling
the settings in 4-19 Max Output
Frequency from 0% to 100% (or vice
versa). The signal levels
corresponding to 0% and 100% are
defined in the analog input scaling,
e.g. parameter group 6-1* Analog
Input 1. This parameter is only active
when 1-00 Configuration Mode is in
Torque Mode.
No function
*
Analog input 53
Analog input 53 inv
Analog input 54
Analog input 54 inv
inv
inv
Function:
This function is used to monitor for
consistency in feedback signal, i.e. if
the feedback signal is available.
Select which reaction the frequency
converter should take if a feedback
fault is detected. The selected action
3 3
73