Danfoss VLT AutomationDrive FC 301 Programming Manual page 73

Parameter Descriptions
NOTICE
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.
4-19 Max Output Frequency
Range: Function:
NOTICE
Size [1 -
related 590
*
This parameter cannot be adjusted
Hz]
while the motor is running.
NOTICE
Max. output frequency cannot exceed
10% of the inverter switching
frequency (14-01 Switching Frequency).
Provides a final limit on the output 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).
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
only active when 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
®
VLT AutomationDrive FC 301/302 Programming Guide
4-20 Torque Limit Factor Source
Option:
[14] Analog in X30-12
[16] Analog in X30-12
inv
4-21 Speed Limit Factor SourceOption
Option:
[0] No function
*
[2] Analog input 53
[4] Analog input 53 inv
[6] Analog input 54
[8] Analog input 54 inv
[10] Analog input X30-11
[12] Analog input X30-11
inv
[14] Analog input X30-12
[16] Analog input X30-12
inv
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:
[0] Disabled
[1] Warning
[2] Trip
*
[3] Jog
[4] Freeze Output
[5] Max Speed
MG33MH02 - Rev. 2013-09-30
Function:
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.
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 is
to take place when the feedback
signal differs from the output speed
by the value set in 4-31 Motor
Feedback Speed Error for longer than
the value set in4-32 Motor Feedback
Loss Timeout.
3 3
71