VLT
®
FCM Series
Programming
which there is a big difference between the full-load
current and idle-load current of the motor.
NB!:
If the value is too high the FC motor can
trip due to overcurrent.
Description of choice:
If the factory setting is not adequate, load
compensation must be set to enable the motor
to start at the given load.
Should be set to 0% in case of quick load
changes. Too high load compensation
may lead to instability.
135 U/f ratio
(U/F RATIO)
Value:
0.00 - 20.00 V/Hz
[0-2000]
✭
Motor dependent
Function:
The output voltage to the motor can be adjusted on
a linear basis from 0 to rated frequency.
136 Slip compensation
(SLIP COMP.)
Value:
-500.0 - +500.0 %
[-5000 - +5000]
✭
100.0 %
[1000]
Function:
The rated slip compensation (factory setting) is
calculated on the basis of the motor parameters. In
parameter 136 the slip compensation can be adjusted
in detail. Optimizing makes the motor speed less load
dependent. This function is not active at the same
time as variable torque (parameter 101).
Description of choice:
Enter a % value of rated slip compensation.
137 DC holding voltage
(DC HOLD VOLTAGE)
Value:
0 - 100 %
[0-100]
✭
0 (OFF) %
[0]
Function:
This parameter is used to uphold the motor function
(holding torque) or to pre-heat the motor. DC
holding voltage is active at stopped motor when it
is set at a value which is different from 0. Coasting
stop will deactivate the function.
Description of choice:
Enter a percentage value.
138 Brake cut out frequency
(BRAKE RELEASE)
Value:
0.5 - 132 Hz (PARAMETER 200)
[5-]
✭
3.0 Hz
[30]
Function:
Here the frequency at which the external brake
is to be released is selected via output set in
parameter 340 during running.
Description of choice:
Set desired frequency.
139 Brake cut in frequency at activated stop
(BRAKE CUT IN)
Value:
0.5 - 132 Hz (PARAMETER 200)
[5-]
✭
3.0 Hz
[30]
Function:
Here the frequency at which the external brake is to
be activated is selected via output set in parameter
340 when the motor is ramping down to stop.
Description of choice:
Set the desired frequency.
See below speed profile for brake function.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.03.H3.02 - VLT is a registered Danfoss trademark
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