Torque Limiting - Siemens SINAMICS S120 Function Manual

3.2.8

Torque limiting

Description
p
1520
M limits
p
1521
p
0640
I limits
p
1530
P limits
p
1531
Fig. 3-33 Torque limiting
The value specifies the maximum permissible torque whereby different limits can
be parameterized for motor and regenerative mode.
S p0640[0...n]
S p1520[0...n]
S p1521[0...n]
S p1522[0...n]
S p1523[0...n]
S p1524[0...n]
S p1525[0...n]
S p1530[0...n]
S p1531[0...n]
The current active torque limit values are displayed in the following parameters:
S r0067
S r1526
S r1527
The following limits all apply to the torque setpoint, which is present either at the
speed controller output in the case of speed control, or at the torque input in the
case of torque control. The minimum/maximum value of the different limits is used
in each case. The minimum value is calculated cyclically and displayed in parame-
ters r1538 and r1539.
S r1538
S r1539
© Siemens AG, 2005. All rights reserved
SINAMICS S120 Function Manual, 06/05 Edition
r
1526
r
1527
r
1538
Min
r
1539
Max
Current limit
CO: Torque limit, upper/motoring
CO: Torque limit, lower/regenerative
CI: Torque limit, upper/motoring
CI: Torque limit, lower/regenerative
CO: Torque limit, upper/motoring, scaling
CO: Torque limit, lower/regenerating scaling
Power limit, motor mode
Power limit, regenerative mode
Maximum drive output current
Upper torque limit of all torque limits without offset
Lower torque limit all torque limits without offset
CO: Upper effective torque limit
CO: Lower effective torque limit
Operating Modes
Vector control
r .8
1407
r .9
1407
3-127