Siemens SINAMICS S120 Function Manual page 923

3. Open the motor contactor:
Motor contactor 1 is opened (r0830 = 0) and the status bit "Motor changeover active"
(r0835.0) is set.
4. Change over the drive data set:
The requested data set is activated (r0051 = requested data set).
5. Energize the motor contactor:
After the feedback signal (motor contactor opened) for motor contactor 1, the appropriate
bit of r0830 is set and motor contactor 2 is energized.
6. Enable the pulses:
After the feedback signal (motor contactor closed) for motor contactor 2, the bit "motor
changeover active" (r0835.0) is reset and the pulses are enabled. The motor has now
been changed over.
Example of a star-delta changeover (via speed threshold; encoderless)
Requirements
● The first commissioning has been completed.
● 2 motor data sets (MDS), p0130 = 2
● 2 drive data sets (DDS), p0180 = 2
● 2 digital outputs to control the auxiliary contactors
● 2 digital inputs to monitor the auxiliary contactors
● 1 free speed monitoring (p2155)
● 2 auxiliary contactors with auxiliary contacts (1 NO contact)
● 2 motor contactors with positively driven auxiliary contacts (1 NC contact, 1 NO contact)
● 1 motor, 1 Control Unit, 1 infeed, and 1 Motor Module
Figure 12-7
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Example: star-delta changeover
Applications
12.5 Motor changeover
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