Siemens SINAMICS G120 Function Manual page 117

If the safety-related input signals too many signal changes within a certain time, then the
inverter responds with a fault.
Figure 5-10
An adjustable signal filter in the inverter suppresses temporary signal changes using bit
pattern test or contact bounce.
The filter increases the inverter response time. The inverter only selects its safety function
after the debounce time has elapsed.
Figure 5-11
Parameter
p9650
p9651
p10002
p10017
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 04/2014, FW V4.7, A5E34261271B AA
Inverter response to a bit pattern test
Filter for suppressing temporary signal changes
Description
F-DI switchover discrepancy time (Factory setting: 500 ms)
Tolerance time to switch over the safety input for the basic functions.
STO debounce time (factory setting: 1 ms)
Debounce time of the safety input for the basic functions.
F-DI switchover discrepancy time (Factory setting: 500 ms)
Tolerance time to switch over the safety inputs for the extended functions.
Digital inputs debounce time (factory setting: 1 ms)
Debounce time of the safety inputs for the extended functions.
Commissioning
5.7 Setting extended functions
117