Torque Limitation - Lenze L-force HighLine C 8400 Series Reference Manual

5.4.3.5

Torque limitation

The previous chapter,
protected from overload. During commissioning, these settings are carried out once and
remain unchanged afterwards. However, it is often necessary to limit the torque to a lower
value for plant or process reasons.
 To avoid overload in the drive train, the torque in motor mode can be limited via the
nTorqueMotLimit_a process input signal, and the torque in generator mode can be
limited via the nTorqueGenLimit_a process input signal:
Identifier
DIS code | data type
nTorqueMotLimit_a
nTorqueGenLimit_a

Note!
• The actual torque (C00056/2) is directly calculated from the current slip
speed of the machine. This requires correct entry of the motor data.
selection/Motor data
• To avoid instabilities during operation with active slip compensation, the
torque limit values are internally processed as absolute values.
• If slip compensation is deactivated
(differential signal between the apparent motor current and
nTorqueMotLimit_a or nTorqueGenLimit_a). Above the no-load current of the
motor, the accuracy of the indirect torque limitation is limited.
Firmware ≤ 11.00 - DMS 6.0 EN - 10/2011
Buy: www.ValinOnline.com | Phone 844-385-3099 | Email: CustomerService@valin.com
"Optimising the Imax
Information/possible settings
Torque limitation in motor mode
• Scaling: 16384 ≡ 100 % M
C00830/29 | INT
• Setting range: 0 ... +199.99 %
• If keypad control is performed: Parameterisable via C00728/1.
Torque limitation in generator mode
• Scaling: 16384 ≡ 100 % M
C00830/28 | INT
• Setting range: -199.99 ... 0 %
• If keypad control is performed: Parameterisable via C00728/2.
( 132)
L
8400 HighLine C | Reference manual
Motor control (MCTRL)
V/f characteristic control (VFCplus)
controller", describes how the drive can be
(C00057)
max
(C00057)
max
(C00021 = 0), indirect torque limitation
Motor
163