6.10
Stop responses
Internal event
An "internal event" is a major fault that causes the inverter to bring the motor to a standstill as
quickly as possible by triggering a STOP reaction. For example, an "internal event" can be
caused by one of the following:
● The inverter detects an internal fault in its hardware or its firmware on the basis of a data
cross-check (F01611).
● The inverter identifies when a limit value is violated as a result of an inadmissible motor
speed (C01714).
An "internal event" can only be acknowledged using a fail-safe signal.
Fail-safe acknowledgment (Page 299)
STOP A
For a STOP A, the inverter safely switches off the torque of the connected motor immediately.
STOP B
For a STOP B, the inverter brakes the motor with the OFF3 ramp-down time until standstill is
detected. This is then followed by a STOP A.
If you operate the motor with torque control, then the inverter switches over the control mode
to speed control.
The inverter monitors the braking of the motor. The type of monitoring corresponds to the
monitoring mode of SS1.
6%
5
6$0
6SHHG
W
6723%
6723$
6723%
6723$
:LWKDFFHOHUDWLRQPRQLWRULQJ
:LWKEUDNLQJUDPSPRQLWRULQJ
Figure 6-50 Speed monitoring for a STOP B
If the motor does not follow the defined braking ramp, the inverter interrupts the braking of the
motor and responds with a STOP A.
Operation
6.10 Stop responses
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
294
Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD
