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14.12.9.10
Input filter
Overview
The input filter 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 specific time
result in a converter fault.
During the filter time (p10017) of the input filter, the converter ignores signal changes.
The input filter 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 filter" function.
Number
p10017[0...2]
p10018
c10035
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.
SINAMICS G220 converter
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
Name
SI digital inputs input filter
SI F-DI self test length dark pulses VS1/VS2
SI SSM input terminal
Functions
14.12 Safety Integrated
Unit
[ms]
[ms]
695
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