14-25 Trip Delay at Torque Limit
Range:
Function:
60 s*
[0 - 60 s]
Enter the torque limit trip delay in seconds. When the output torque reaches the torque limits (par.
4-16
), a warning is triggered.
When the torque limit warning has been continuously present for the period specified in this pa-
rameter, the frequency converter trips. Disable the trip delay by setting the parameter to 60 s =
OFF. Thermal frequency converter monitoring will still remain active.
14-26 Trip Delay at Inverter Fault
Range:
Function:
0. s*
[0 - 35 s]
When the frequency converter detects an over-voltage in the set time trip will be effected after the
set time.
14-29 Service Code
Range:
Function:
0 N/A*
[-2147483647 - 2147483647 N/A] Service use only.
2.13.5 Current Limit Control, 14-3*
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 par. 4-16 and 4-17.
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
Coast inverse
[2] or
Coast and reset inv.
[3].
Any signal on terminals 18 to 33 will not be active until the frequency converter is no longer near the current limit.
By using a digital input set to
Coast inverse
[2] or
Coast and reset inv.
[3], the motor does not use the ramp-down time, since the frequency converter
is coasted.
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 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:
26.0 ms*
[1.0 - 100.0 ms]
2.13.6 Energy Optimising, 14-4*
Parameters for adjusting the energy optimisation level in both Variable Torque (VT) and Automatic Energy Optimization (AEO) mode.
Automatic Energy Optimisation is only active if par.1-03, Torque Characteristics, is set for either
Auto Energy Optim. CT
[2] or
Auto Energy Optim. VT
[3].
VLT
®
AQUA Drive Programming Guide
2 Parameter Description
MG.20.O4.02 - VLT
®
is a registered Danfoss trademark
139
2