Danfoss VLT AutomationDrive FC 300 Design Manual page 206

FC 300 Design Guide
If the test fails:
LCP read-out:
Control Card I/O failure. Replace the unit or Control
card. The red LED on the Control Card is turned on.
Test plugs (connect the following terminals to each
other): 18 - 27 - 32; 19 - 29 - 33; 42 - 53 - 54
Select Initialization [2] to reset all parameter
values to default setting, (except par. 15-03,
15-04, and 15-05). The drive resets during the
next power-up. The parameter also resets to
default setting Normal operation [0].
14-25 Trip Delay at Torque Limit
Option:
0 - 60 s
Function:
When the frequency converter registers that
the output torque has reached the torque limits
(par. 4-16 and 4-17) a warning is shown. If
this warning is continuously present as long
as specified in this parameter, the frequency
converter trips. The feature is disabled by setting
the parameter to 60 s = OFF. However, the
thermal VLT monitoring is still active.
14-3* Current Limit Control
"
The FC 300 Series features an integral current limit
control 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 drive
is at the current limit during motor operation or
default setting ( )
*
206
How to Programme
*
display text [ ] value for use in communication via serial communication port
MG.33.B4.02 - VLT is a registered Danfoss trademark
regenerative operation, the frequency converter will
try to get 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 using any digital
input set 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 drive
is coasted. If a quick stop is neccesary, use
the mechanical brake control function along
with an external electro-mechanical brake
attached to the application.
14-30 Current Lim Cont, Proportional Gain
Option:
0 - 500 %
Function:
Controls the proportional gain of the current limit
control. Setting it to a higher value makes it react
faster. A setting too high leads to control instabillity.
14-31 Current Lim Contr, Integration Time
Option:
0.002 - 2.000 s
Function:
Controls the current limit control integration time.
Setting it to a lower value makes it react faster. A
setting too low leads to control instabillity.
14-4* Energy Optimising
"
This group contains parameters for adjusting
60 s
the energy optimisation level in both
Variable Torque (VT) and Automatic Energy
Optimization (AEO) mode.
14-40 VT Level
Range:
40 - 90%
Function:
Sets the level of motor magnetisation at low speed.
A low value results in less energy loss in the motor.
Note that the consequence is reduced load capability.
Par. 14-40 cannot be adjusted while the
motor is running.
*
100 %
*
0.020 s
*
66%