Danfoss VLT AutomationDrive FC 301 Programming Manual page 462

VLT AutomationDrive FC 301/302
Programming Guide
Enter the current limit trip delay in s. When the output current reaches the current limit (parameter 4-18 Current Limit), a warning is
triggered. When the current limit warning has been continuously present for the period specified in this parameter, the drive trips.
To run continuously in current limit without tripping, set the parameter to 60 s. Thermal monitoring of the drive remains active.
Parameter 14-25 Trip Delay at Torque Limit
Table 720: Parameter 14-25 Trip Delay at Torque Limit
14-25 Trip Delay at Torque Limit
Default value: 60 s
Conversion index: 0
Enter the torque limit trip delay in s. When the output torque reaches the torque limits (parameter 4-16 Torque Limit Motor Mode and
parameter 4-17 Torque Limit Generator Mode), a warning is triggered. When the torque limit warning has been continuously present
for the period specified in this parameter, the drive trips. Disable the trip delay by setting the parameter to 60 s. Thermal monitoring
of the drive remains active.
Parameter 14-26 Trip Delay at Inverter Fault
Table 721: Parameter 14-26 Trip Delay at Inverter Fault
14-26 Trip Delay at Inverter Fault
Default value: Size related
Conversion index: 0
When the drive detects an overvoltage in the set time, a trip is effected after the set time. If the value is 0, protection mode is disa-
bled.
Disable protection mode in hoisting applications.
5.14.4 14-3* Current Limit Control
The following parameters are only available in FC 302:
-
Parameter 14-33 Torque Change Detection
-
Parameter 14-36 Field-weakening Function
-
Parameter 14-37 Fieldweakening Speed
-
Paraneter 14-38 Field Weakening Controller Gain
-
Parameter 14-39 Torque Change Threshold Limit
The drive features an integral current limit controller, which is activated when the motor current, and thus the torque, is higher than
the torque limits set in parameter 4-16 Torque Limit Motor Mode and parameter 4-17 Torque Limit Generator Mode. When the current
limit is reached during motor operation or regenerative operation, the drive tries to reduce torque below the preset torque limits as
quickly as possible without losing control of the motor. While the current control is active, the drive can only be stopped by setting
a digital input to [2] Coast inverse or [3] Coast and reset inv. Any signals on terminals 18–33 are not active until the drive is no longer
near the current limit. By using a digital input set to [2] Coast inverse or [3] Coast and reset inv., the motor does not use the ramp-
down time, since the drive is coasted. If a quick stop is necessary, use the mechanical brake control function along with an external
electro-mechanical brake attached to the application.
462 | Danfoss A/S © 2022.12
Parameter type: Range, 0 - 60 s
Data type: Uint8
Parameter type: Range, 0 - 35 s
Data type: Uint8
N O T I C E
N O T I C E
Parameter Descriptions
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
AU275636650261en-000101 / 130R0334