Stop Reactions - Siemens SINAMICS G120 Function Manual

Alarms, faults and system messages
6.2 Reaction of the safety functions to faults
6.2.3

STOP reactions

The inverter responds to an "internal event" with a STOP (STOP A, STOP B or STOP F).
Response of the motor in the event of a STOP
STOP A
For a STOP A, the inverter safely switches off the torque of the connected motor
immediately. The behavior of the motor corresponds to stop category 0, which is defined in
EN 60204.
STOP B
For a STOP B, the inverter brakes the motor with the OFF3 ramp-down time until standstill is
identified corresponding to stop Category 1 according to EN 60204. 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 Monitoring modes of SS1 (Page 21).
Figure 6-1
If the motor does not follow the defined braking ramp, the inverter interrupts the braking of
the motor and responds with a STOP A.
192
Speed monitoring for a STOP B
Safety Integrated Function Manual, SINAMICS G120 and G120C
Function Manual, 01/2011, FW 4.4, A5E03052391B AB