Siemens SINAMICS G220 - Input Filter; Self-Test of the Fail-Safe Digital Input (F-DI)

14.12.9.10 Input 󹪝lter
Overview
The input 󹪝lter suppresses unwanted brief signal changes at a failsafe digital input (F-DI).
Description of function
If a failsafe digital input (F-DI) is interconnected with an electromechanical sensor, for example,
then contact bounce leads to brief signal changes. In this case, an immediate response of the
converter to signal changes is not desirable. Too many signal changes within a speci󹪝c time
result in a converter fault.
During the 󹪝lter time (p10017) of the input 󹪝lter, the converter ignores signal changes.
The input 󹪝lter lengthens the response time of the Safety Integrated Function interconnected
with the F-DI.
Parameters
The following list contains the parameters of the "Debounce time for the input 󹪝lter" function.
Number Name Unit
p10017[0...2] SI digital inputs input 󹪝lter [ms]
p10018 SI F-DI self test length dark pulses VS1/VS2 [ms]
c10035 SI SSM input terminal 
14.12.9.11 Self-test of the fail-safe digital input (F-DI)
Overview
The self-test detects whether a fail-safe digital input can be switched to the Low state. The
converter responds with a fault if there is an unexpected feedback signal during the self-test.
Requirement
If the self-test of the fail-safe input is activated, then the length of dark pulse must be longer than
0.5 ms.
Description of function
The converter tests a fail-safe digital input continuously as soon as the fail-safe digital input is in
the High state.
Functions
14.12Safety Integrated
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB 695