Efficient Networks Siemens Sinamics S120 - Manual (Page 198)

Basic functions
6.9 OFF3 torque limits
Drive Functions
198
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
6.9 OFF3 torque limits
Description
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.
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Figure 6-6 Torque limits OFF3
Function diagrams (see SINAMICS S List Manual)
● 5620 Motor/generator torque limits
● 5630 Upper/lower torque limit
● 6630 Upper/lower torque limit
Overview of key parameters (see SINAMICS S List Manual)
● p1520 Torque limit, upper/motoring
● p1521 Torque limit, lower/regenerative