Siemens SINAMICS G120 Operating Instructions Manual page 235
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An adjustable signal filter in the inverter suppresses temporary signal changes using bit
pattern test or contact bounce.
Figure 8-28
Note
The filter increases the inverter response time. The inverter only activates its safety function
after the debounce time has elapsed (parameters p9651 and p9851).
Note
Debounce times for standard and safety functions
The debounce time p0724 for "standard" digital inputs has no influence over the fail-safe
input signals. Conversely, the same applies: The F-DI debounce time does not influence the
signals of the "standard" inputs.
If you use an input as a standard input, set the debounce time at p0724.
If you use an input as fail-safe input, set the debounce time as described above.
SINAMICS G120C Inverter
Operating Instructions, 01/2011, FW 4.4, A5E02999804A AB
Filter for suppressing temporary signal changes
8.10 Fail-safe function Safe Torque Off (STO)
Functions
233
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