Commissioning
4.11 Configuring brake control
Commissioning with Startdrive
288 Commissioning Manual, 11/2017, 6SL3097-4AA10-0BP1
Configuring brake control
4.11.1
The drives of the SINAMICS S120 family are equipped with a brake control for motor holding
brakes:
The brake control is only used for the control of motor holding brakes. A differentiation is
made between mechanically braking and electrically braking a motor:
● Mechanical brakes are generally motor holding brakes that are closed when the motor is
at a standstill.
● Mechanical operating brakes that are closed while the motor is rotating are subject to a
high wear and are therefore often only used as an emergency brake.
● The motor is electrically braked by the converter. An electrical braking is completely wear-
free.
Generally, a motor is switched off at standstill in order to save energy and so that the motor
temperature is not unnecessarily increased. Drives that have been switched off, can be
secured against unwanted motion by the holding brake.
The motor holding brake control in the inverter is suitable typically for horizontal, inclined and
vertical conveyors. A motor holding brake can also be useful in several applications for
pumps or fans to ensure that the switched-off motor does not rotate in the wrong direction
due to a liquid or air flow.
Danger as a result of a damaged holding brake caused by incorrect parameter assignment
If the drive moves against the closed holding brake, this can destroy the holding brake and
cause death or serious injury.
• Do not set the parameter assignment p1215 = 0 when there is a holding brake.
• Set all the relevant parameters correctly.
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