Siemens SINAMICS S120 Function Manual page 77

Variants of torque limitation
The following variants are available:
1. No settings entered:
The application does not require any additional restrictions to the torque limits.
2. Fixed limits are required for the torque:
– The fixed upper and lower limits or alternatively the fixed motor and
regenerative limits can be specified separately by different sources.
3. Dynamic limits are required for the torque:
– The dynamic upper and lower limit or, alternatively, the dynamic motor and
regenerative limit can be specified separately by different sources.
– Parameters are used to select the source of the current limit.
4. A torque offset can be parameterized.
5. In addition, the power limits can be parameterized separately for motor and
regenerative mode.
Notice
Negative values at r1534 or positive values at r1535 represent a minimum torque
for the other torque directions and can cause the drives to rotate if no load torque
is generated to counteract this (see List Manual SINAMICS S function diagram
5630).
Example: Torque limits with or without offset
The signals selected via p1522 and p1523 include the torque limits parameterized
via p1520 and p1521.
p1520
p1522 Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ
Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ
p1523
Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ
p1521
Fig. 3-10
© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition
M_offset = 0
Example: Torque limits with or without offset
Operating Modes
p1520
p1522
Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ
Ñ Ñ Ñ Ñ Ñ Ñ Ñ Ñ
p1523
p1521
Servo control
M_offset > 0
3-77