Descriptions of functions
10.10 Switch on, switch off, enable
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
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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).
