14-25 Trip Delay at Torque Limit
Range:
Function:
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 frequency
converter trips. Disable the trip delay by setting
the parameter to 60 s = Off. Thermal monitoring
of the frequency converter will still remain active.
14-26 Trip Delay at Inverter Fault
Range:
Function:
Size related
*
[0 - 35
s]
When the frequency converter detects an
over-voltage in the set time trip will be
effected after the set time.
If value = 0,
protection mode
is disabled
NOTE
It is recommended to disable
protection mode
in hoisting
applications.
14-29 Service Code
Range:
Function:
0
*
[-2147483647 - 2147483647 ]
For internal service only.
3.15.3 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
and
When the current limit is reached during motor operation
or regenerative operation, the frequency converter will try
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 signal on terminals
18 to 33 will not be active until thefrequency 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:
Function:
100 %
*
[0 - 500 %] Enter the proportional gain value for the
current limit controller. Selection of a high
value makes the controller react faster. Too
14-30 Current Lim Ctrl, Proportional Gain
Range:
Function:
high a setting leads to controller
instability.
14-31 Current Lim Ctrl, Integration Time
Range:
Function:
0.020 s
*
[0.002 - 2.000
s]
Controls the current limit control
integration time. Setting it to a lower
value makes it react faster. A setting
too low leads to control instability.
14-32 Current Lim Ctrl, Filter Time
Range:
Function:
Size related
*
[1.0 - 100.0 ms]
14-35 Stall Protection
Option:
Function:
Select Enable [1] to enable the stall protection in
field-weakening in flux mode. Select
[0] Disabled
if you desire to disable it. This might cause the
motor to be lost.
is active in
Flux mode only.
[0]
Disabled
[1]
*
Enabled
3.15.4 14-4* Energy Optimising
Parameters for adjusting the energy optimisation level in
both Variable Torque (VT) and Automatic Energy Optimi-
zation (AEO) mode in
14-40 VT Level
Range:
Function:
66 %
*
[40 - 90 %] Enter the level of motor magnetisation at
low speed. Selection of a low value reduces
energy loss in the motor, but also reduces
load capability.
NOTE
This parameter cannot be adjusted while the motor is
running.
NOTE
This parameter is not active when
1-10 Motor Construction
is set to
[1] PM non salient SPM
.
14-41 AEO Minimum Magnetisation
Range:
Function:
Size related
*
[40 - 75
%]
Enter the minimum allowable magnet-
isation for AEO. Selection of a low
value reduces energy loss in the
motor, but can also reduce resistance
to sudden load changes.
Parameter Descriptions
VLT
®
AutomationDrive Programmming Guide
134
MG33ME02 - VLT
®
is a registered Danfoss trademark
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