Response Times - Siemens SINAMICS G120 Function Manual

8.2

Response times

Response times after selection
When selecting the Safe Torque Off (STO) function, the motor is safely in a no-torque
condition after the response time. If, at the instant that STO is selected, the motor is
stationary, then after the response time, the motor is also in a safe state.
For all other functions, which are active after selection, the relationship between the
response time and safe state of the motor is not always clear:
● SS1 of the basic functions: The motor is only in a safe state after the safety-related timer
● SS1 of the extended functions: The motor is only in a safe state when at standstill. When
● SLS and SDI: The motor is only in a safe state with the feedback signal "SLS is active" or
After selection, the response time is only relevant for the application for the STO function
and is only specified for STO.
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 04/2014, FW V4.7, A5E34261271B AA
has expired and at standstill. In practice, after selection, the response time in comparison
to the safety-related timer can be neglected.
SS1 is selected, the inverter brakes the motor after the response time. Although the
inverter monitors braking, the time until the motor comes to a standstill depends on the
application itself, and from a non-safety-related parameter. Consequentially, in practice
the response time after selection is not relevant.
"SDI is active". The time from selecting the function until the motor reaches a safe state
depends on the application itself, and from a non-safety-related parameter.
Consequentially, in practice the response time after selection is not relevant.
System properties
8.2 Response times
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