Descriptions of functions
10.10 Switch on, switch off, enable
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
553
Sequence of events for switching on the drive:
1. Apply the "Switch on" command (e.g. using the "Switch on/Shutdown" terminal).
2. The system exits operating state o7.
3. The "Line contactor closed" relay (terminal XR1-109 and XR1-110) picks up.
4. The field-current reduction function stops
5. if "Operation enable" is applied:
– With positive brake-release time (p50087):
The "Release holding or operational brake" signal (r53210.0 = 0) is output and p50087
is awaited in operating state o1.0.
– With negative brake-opening time (p50087 negative):
Go immediately to step 6; brake is still closed (r53210.0 = 1)
6. The ramp-function generator, n controller, and I controller are enabled.
7. Once a negative brake-release time (p50087) has elapsed, the "Release holding or
operational brake" (r53210.0 = 0) signal is output.
Procedure for shutting down the drive:
1. Apply the "Switch on" command (e.g. using the "Switch on/Shutdown" terminal).
2. Deceleration along the ramp-function generator ramp
3. Wait until n < nmin (p50370, p50371).
4. The "Close holding or operational brake" (r53210.0 = 1) signal is output.
5. The brake-closing time (p50088) is awaited.
6. The ramp-function generator and n controller are disabled.
7. Reduction in armature current
8. The armature firing pulses are disabled.
9. The "Line contactor closed" relay (terminal XR1-109 and XR1-110) drops out.
10.Operating state o7.0 or higher is reached.
11.The wait time for field-current reduction (p50258) elapses.
12.The field is reduced to a parameterizable value (p50257).
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