Siemens SINAMICS G120C Operating Instructions Manual page 271

Figure 6-56
2. Set the debounce time for the F-DI input filter.
3. Set the discrepancy for the simultaneity monitoring.
4. Only applies to STARTER: Close the screen form.
You have set the input filter and the simultaneity monitoring of the safety-related input.
Description of the signal filter
The following are available for the signal processing of the safety-related inputs:
● A tolerance time for the simultaneity monitoring.
● A filter to suppress short signals, e.g. test pulses.
Tolerance time for the simultaneity monitoring
The inverter checks whether the signals at both inputs always have the same signal status
(high or low).
With electromechanical sensors (e.g. emergency stop buttons or door switches), the two
sensor contacts never switch at exactly the same time and are therefore temporarily
inconsistent (discrepancy). A long-term discrepancy indicates a fault in the wiring of a safety-
related input, e.g. a wire break.
When appropriately set, the inverter tolerates brief discrepancies.
SINAMICS G120C converter
Operating Instructions, 07/2015, FW V4.7 SP3, A5E34263257B AC
Input filter and simuntaneity monitoring in Startdrive
Advanced commissioning
6.8 Safe Torque Off (STO) safety function
267