Simultaneity And Tolerance Time Of The Two Monitoring Channels - Siemens SINAMICS S120 Function Manual

Control of the safety functions
5.2 Control signals by way of terminals on the Control Unit and Motor / Power Module
5.2.1

Simultaneity and tolerance time of the two monitoring channels

The monitoring functions must be selected/deselected simultaneously in both monitoring
channels via the input terminals and only have an effect on the associated drive.
● 1 signal: Deselecting the function
● 0 signal: Selecting the function
The time delay that is unavoidable due to mechanical switching, for example, can be
adapted via parameters. The tolerance time, within which selection/deselection of the two
monitoring channels must occur if they are to be considered "simultaneous," is set in the
following parameters:
● p9650 (Basic Functions)
● p10002 (Extended/Advanced Functions)
Note
Parameterization of the tolerance time
In order to avoid that faults are incorrectly initiated, at these inputs the tolerance time must
always be set shorter than the shortest time between two switching events (ON/OFF,
OFF/ON).
● If the monitoring functions are not selected/deselected within the tolerance time, this is
detected by the cross-check, and the following fault (STOP F) is output.
– F01611 (Basic Functions)
– C01770 (Extended/Advanced Functions)
For STO: In this case, the pulses have already been canceled as a result of the selection
of "Safe Torque Off" on one channel.
Note
Timing between the switching operations in the Basic Functions
Message F01611 with fault value 1000 is output if switching operations occur too
frequently. The cause depends on the type of control:
• Persistent signal changes occurred at the F-DI.
• STO was permanently triggered via PROFIsafe (also as subsequent response).
Within the time 5 · p9650, there must be at least two switching operations at the terminals
or via PROFIsafe with a minimum time between them of p9650.
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Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated