Siemens SINAMICS S120 - OFF3 Torque Limits

Basic functions
7.14 OFF3 torque limits
Drive functions
358 Function Manual, 11/2017, 6SL3097-4AB00-0BP5
7.14
OFF3 torque limits
If the torque limits are externally specified (e.g. tension controller), then the drive can only be
stopped with a reduced torque. If stopping in the selected time p3490 of the infeed has not
been completed, the infeed shuts down and the drive coasts down.
In order to avoid this, there is a binector input (p1551), that for a LOW signal, activates the
torque limits p1520 and p1521. This means that the drive can brake with the maximum
torque by interconnecting the signal OFF 3 (r0899.5) to this binector.
Function diagrams (see SINAMICS S120/S150 List Manual)
•
5620
Servo control
- Motoring/generating torque limit
•
5630
Servo control
- Upper/lower torque limit
•
6630
Vector control
- Upper/lower torque limit
Overview of important parameters (see SINAMICS S120/S150 List Manual)
•
p1520[0...n]
Torque limi
t, upper/motoring
•
p1521[0...n]
CO: Torque limit, lower/regenerative