Safety Integrated Basic Functions
10.8 Control via terminals on the Control Unit and Motor/Power Module
Drive functions
700 Function Manual, 11/2017, 6SL3097-4AB00-0BP5
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
The time delay that is unavoidable due to mechanical switching processes, for example, can
be adapted via parameters. p9650 specifies the tolerance time within which
selection/deselection of the two monitoring channels must take place to be considered as
"simultaneous".
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 "Safe Torque Off" function is not selected/deselected within the tolerance time, this is
detected by the cross-comparison, and fault F01611 (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.
Note
Timing between the switching operations
Message F01611 with fault value 1000 is output if switching operations occur too frequently.
The cause depends on the type of control:
The signals are continually changing at the F-DI.
STO is being permanently initiated via PROFIsafe (also as subsequent response).
· p9650, there must be at least two switching operations at the terminals or
fe with a minimum time between them of p9650.
Additional notes regarding setting the discrepancy time are included in the "SINAMICS
S120/S150 List Manual" for the C01770 and F01611 safety messages.
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