Motor components and options
4.1 Motor components
1FW6 Built-in torque motors
88 Configuration Manual, 07/2017, 6SN1197-0AE00-0BP9
Uncontrolled coast down of the drive as a result of malfunctions
Malfunctions on a rotating machine axes can lead to the drive coasting to a stop in an
uncontrolled manner.
• Take the appropriate measures to brake the drive with its maximum possible kinetic
energy in the event of a fault.
The design of mechanical braking systems depends on the maximum kinetic energy, that is,
the maximum moment of inertia of the rotating mass and its maximum speed.
Malfunctions can occur e.g. for:
● Power failure
● Encoder failure, encoder monitoring responds
● Higher-level control failure (e.g., NCU); bus failure
● Control Unit failure
● Drive fault
● Faults in the NC
Below are a number of options showing how rotating masses can be braked in the event of a
malfunction.
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