Siemens Sinamics G110M Operating Instructions Manual page 202

Advanced commissioning
6.13 Safe Torque Off (STO) safety function
Procedure with Startdrive
Proceed as follows to set the input filter and the simultaneity monitoring of the fail-safe digital
input:
1. Navigate to the filter settings.
2. Set the debounce time for the F-DI input filter.
3. Set the discrepancy time for the simultaneity monitoring.
You have set the input filter and the simultaneity monitoring of the fail-safe digital input.
Description of the signal filter
The following filters are available for the fail-safe digital inputs:
● One filter for the simultaneity monitoring
● A filter to suppress short signals, e.g. test pulses.
Set the discrepancy time for the simultaneity monitoring.
The inverter checks that the two input signals of the fail-safe digital input always have the
same signal state (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 permanent discrepancy signifies a fault in the fail-safe digital
input circuit, e.g. wire breakage.
When appropriately set, the inverter tolerates brief discrepancies.
The discrepancy time does not extend the inverter response time. The inverter selects its
safety function as soon as one of the two F-DI signals changes its state from high to low.
Figure 6-28
202
Simultaneity monitoring with discrepancy time
Distributed converter for SIMOGEAR geared motors
Operating Instructions, 09/2017, FW V4.7.9, A5E31298649B AH