VLT
®
5000 Series
the percentage (relative) value selected in parameter
219 will be deducted from the total reference.
221
221 Torque limit for motor mode
(TORQ LIMIT MOTOR)
Value:
0.0 % - xxx.x % of T
M,N
✭ 160 % of T
M,N
Function:
This function is relevant for all application configura-
tions; speed, process and torque control.
This is where to set the torque limit for motor opera-
tion. The torque limiter is active in the frequency
range up to the rated motor frequency (parameter
104).
In the oversynchronous range, where the frequency
is higher than the rated motor frequency, this func-
tion acts as a current limiter.
See fig. below.
Description of choice:
See also parameter 409 for further details.
In order to protect the motor from reaching pull-out
torque, the factory setting is 1.6 x the rated motor
torque (calculated value).
If a synchronous motor is used, the torque limit must
be increased in relation to the factory setting.
If a setting in parameters 101-106 is changed, pa-
rameters 221/222 are not automatically reversed to
the factory setting.
222
222 Torque limit for generating operation
(TORQ LIMIT GENER)
Value:
0.0 % - xxx.x % of T
M,N
✭ 160 %
The max. torque depends on the unit and the motor
size selected.
Function:
This function is relevant for all application configura-
tions; speed, process and torque control.
This is where to set the torque limit for generating
operation. The torque limiter is active in the fre-
quency range up to the rated motor frequency
(parameter 104).
In the oversynchronous range, where the frequency
is higher than the rated motor frequency, this func-
tion acts as a current limiter.
See fig. for parameter 221 as well as parameter 409
for further details.
Description of choice:
If Resistor brake [1] has been selected in parameter
400, the torque limit is changed to 1.6 x the rated
motor torque.
223
223 Warning: Low current
(WARN. CURRENT LO)
Value:
0.0 - parameter 224
✭ 0.0 A
Function:
When the motor current is below the limit, I
LOW
, pro-
grammed in this parameter, the display indicates
CURRENT LOW.
The signal outputs can be programmed to transmit a
status signal via terminal 42 or 45 as well as via re-
lay output 01 or 04 (parameter 319, 321, 323 or 326).
Description of choice:
The lower signal limit I
LOW
of the motor current must
be programmed within the normal working range of
the frequency converter.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.51.A1.02 - VLT is a registered Danfoss trade mark
125
Programming
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