Lenze 8400 motec - Manual (Page 268)

8 Basic functions
8.2 Holding brake control
268 Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05
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8.2 Holding brake control
An automatic holding brake control function is integrated in the application which controls the
holding brake in relation to the speed setpoint and diverse other internal control signals. Due to
integrated automatic brake operation, the user is relieved of the task of managing these control
signals.
Intended use
Motor holding brakes are used to lock axes if the controller is inhibited or in case of "mains off"
system status. This is not only important for vertical axes but also for e.g. horizontal axes which may
cause various problems if the motion is not controlled.
Examples:
• Loss of the reference information after mains OFF and further spinning of the drive.
• Collision with other moving machine parts.

Danger!
Please note that the holding brake is an important element of the safety concept of the
entire machine.
Thus, proceed very carefully when commissioning this system part!

Stop!
Holding brakes on Lenze motors are not intended for braking during operation. The
increased wear caused by braking during operation can destroy the motor holding
brake!

Note!
• Deactivate automatic DC-injection braking when a holding brake is used!
• For this purpose, go to C00019 and set the Auto DCB threshold to "0".
• Background: Controller inhibit is already activated by the holding brake control.
• If an electrically holding (self-releasing) brake is to be controlled instead of an
electrically released (self-holding) brake, the trigger signal must be inverted!

Functional settings ( 273)
• Detailed information on mounting and electrical installation of the motor holding
brake can be found in the documentation on the motor holding brake.