Siemens SINAMICS S120 Function Manual page 60

Control of the safety functions
5.2 Control via terminals on the Control Unit and the power unit
Figure 5-2 Grouping terminals with Motor Modules Booksize and CU320
Information on the parallel connection of chassis type Motor Modules
When Motor Modules of chassis type are connected in parallel, a safe AND element is
created on the parallel drive object. The number of indexes in p9620 corresponds to the
number of parallel chassis components in p0120.
Simultaneity and tolerance time of the two monitoring channels
The "Safe Torque Off" function must be selected/deselected simultaneously in both
monitoring channels using the input terminals and is only effective for the associated drive.
1 signal: Deselecting the function
0 signal: Selecting the function
"Simultaneously" means:
The changeover must be complete in both monitoring channels within the parameterized
tolerance time.
● p9650 SI tolerance time F-DI changeover (Control Unit)
● p9850 SI tolerance time F-DI changeover (Motor Module)
If the "Safe Torque Off" function is not selected/deselected within the tolerance time, this is
detected by the crosswise comparison, and fault F01611 or F30611 (STOP F) is output. In
this case, the pulses have already been canceled as a result of the selection of "Safe Torque
Off" on one channel.
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Function Manual, (FHS) , 07/2007 Edition, 6SL3097-2AR00-0BP0
Safety Integrated