Siemens SINAMICS DCM Operating Instructions Manual page 525

10.10.2 OFF2 (disconnection) – Control word bit 1
The OFF2 signal is LOW active (log. "0" state = disconnection).
Procedure for applying disconnection:
1. The ramp-function generator, n controller, and Ia controller are disabled.
2. Reduction in armature current
3. The firing pulses are disabled.
4. "Close operational brake" is output (r53210.0 = 1, where p50080 = 2).
5. Operating state o10.0 or higher is reached.
6. The field current is maintained at a fixed point (i.e. there is no increase in the field current,
even on exiting the field-weakening range).
7. The "Line contactor closed" relay (terminal XR1-109 and XR1-110) drops out.
8. The drive coasts down (or is decelerated by the operational brake).
9. The parameterizable wait time (p50258) elapses.
10.The field is reduced to a parameterizable value (p50257).
11.Once n < nmin (p50370, p50371), the "Close holding brake" signal is output (r53210.0 =
1, where p50080 = 1).
10.10.3 OFF3 (quick stop) – Control word bit 2
The OFF3 signal is LOW active (log. "0" state = quick stop).
Procedure for applying "Quick stop":
1. The ramp-function generator is disabled.
2. A speed setpoint of zero is applied.
3. Deceleration along the down ramp acc. to p50296, p50297, p50298
4. Wait until n < nmin (p50370, p50371).
5. "Close operational or holding brake" (r53210.0 = 1) is output.
6. Wait for brake-closing time (p50088)
7. The ramp-function generator and speed controller are disabled.
8. Reduction in armature current
9. The armature firing pulses are disabled.
10.The "Line contactor closed" relay (terminal XR1-109 and XR1-110) drops out.
11.Operating state o9.0 or higher is reached.
12.The wait time for field-current reduction (p50258) elapses.
13.The field is reduced to a parameterizable value (p50257).
SINAMICS DCM Control Module
Operating Instructions, 12/2018, A5E34888669A
Descriptions of functions
10.10 Switch on, switch off, enable
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