Stop Responses - Siemens SINAMICS G120 Function Manual

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
● The inverter identifies when a limit value is violated as a result of an inadmissible motor
An "internal event" can only be acknowledged using a fail-safe signal. See also: Fail-safe
acknowledgment signal (Page 232).
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, also see section Setting SS1 (Page 130).
Figure 6-47
If the motor does not follow the defined braking ramp, the inverter interrupts the braking of
the motor and responds with a STOP A.
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 04/2014, FW V4.7, A5E34261271B AA
cross-check (F01611).
speed (C01714).
Speed monitoring for a STOP B
Operation
6.10 Stop responses
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