Danfoss VLT AutomationDrive FC 301 Programming Manual page 237

Parameter Descriptions
14-22 Operation Mode
Option: Function:
Parameter 14-22 Operation Mode
also returns to the default setting
[0] Normal operation.
[0] Normal
*
operation
[1] Control card Remember to set switches S201
test (A53) and S202 (A54) as specified in
the parameter description when
performing a control card test.
Otherwise, the test fails.
[2] Initialisation Select this option to perform initial-
ization. This option does not clear
the service logs.
[3] Boot mode
NOTICE
[5] Clear service
logs
Save the log information using
MCT 10 Set-up Software
before clearing the service
logs.
Select this option and perform a
power cycle to clear the log. For
more information, see
chapter 3.15.4 Clearing the Service
Log. See also
parameter 16-42 Service Log Counter.
14-24 Trip Delay at Current Limit
Range: Function:
60 s [0 - 60 s] 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
frequency converter trips. To run
continuously in current limit
without tripping, set the parameter
to 60 s. Thermal monitoring of the
frequency converter remains active.
14-25 Trip Delay at Torque Limit
Range: Function:
60 s [0 - 60 s] 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
M0013101
Programming Guide
14-25 Trip Delay at Torque Limit
Range:
14-26 Trip Delay at Inverter Fault
Range:
Size
related
*
3.14.3 14-3* Current Limit Control
The frequency converter 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 frequency converter 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 frequency converter
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 frequency converter 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 frequency converter 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.
14-30 Current Lim Ctrl, Proportional Gain
Range:
100 %
*
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Function:
warning has been continuously
present for the period specified in
this parameter, the frequency
converter trips. Disable the trip
delay by setting the parameter to
60 s. Thermal monitoring of the
frequency converter remains active.
Function:
[ 0 - 35 s] When the frequency converter
detects an overvoltage in the set
time, trip is effected after the set
time.
If value is 0, protection mode is
disabled.
NOTICE
Disable protection mode in
hoisting applications.
Function:
[0 - 500 %] Enter the proportional gain value
for the current limit controller.
Selection of a high value makes the
controller react faster. Too high a
setting leads to controller
instability.
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