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Figure 6-22 Controlling the motor holding brake after OFF2
After the OFF2 command, the inverter issues the signal to immediately close the motor holding
brake, irrespective of the motor speed.
Commissioning a motor holding brake
WARNING
Load can fall if the "Motor holding brake" function is incorrectly set
For applications with a suspended load, such as cranes and elevators, there is a danger to
life if the "Motor holding brake" function is not completely set or is incorrectly set.
● When commissioning the "Motor holding brake" function, secure any suspended loads,
e.g. by applying the following measures:
– Lower the load down to the floor.
– Secure the dangerous area so that nobody can inadvertently enter it.
● Set the "Motor holding brake" function according to the following description.
● After commissioning, check that the motor holding brake and the motor control function
reliably.
● For applications involving suspended loads, we recommend that you use vector control
together with an encoder.
Requirements
● The motor holding brake is connected to the inverter.
● You have assigned the "Controlling the motor holding brake" function to a digital output:
– DO 0: p0730 = 52.12
– DO 1: p0731 = 52.12
Advanced commissioning
6.12 Motor holding brake
SINAMICS G120C converter
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34263257B AF 207
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