Lenze 8400 - Manual (Page 539)

Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
539
8 Basic drive functions (MCK)
8.12 Holding brake control
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
8.12.2.1 Operating mode
For different applications and tasks, different operating modes are available in C02580 . The
selected operating mode determines whether the holding brake control is used and how the
holding brake will be switched.
Mode 0: Brake control off
In this mode, brake control is switched off (not active).
• The trigger signal bMBrakeReleaseOut for the holding brake control switching element is set to
FALSE.
• The status signal bMBrakeReleased is set to FALSE.
Mode 11: Manual control
In this mode, brake release and brake application can be directly controlled via the input
bMBrakeReleaseBrake without special logic or automatic.
• Setting pulse inhibit or controller inhibit has no influence on the trigger signal
bMBrakeReleaseOut for the holding brake control switching element.
• After the brake has been activated and the brake application time has expired, the controller is
inhibited automatically by the basic "Holding brake control" function.

Tip!
You can use mode 11 to easily check if the brake switches correctly.
Mode 12: Automatic control
In this mode, the brake is controlled automatically.
• If the requested speed setpoint reaches a parameterisable upper speed threshold that allows
traversing of the drive, the brake will be released and operation enabled.
• On the other hand, if speed setpoint and actual speed fall below a parameterisable lower speed
threshold, the brake will be applied under consideration of different time parameters.
• For operating modes with setpoint request via control signal (e.g. "PosExecute" in the
Positioning " operating mode), the speed thresholds do not apply. Here the control logic opens
and closes the holding brake through internal commands in the Motion Control Kernel.
• The brake will also be activated automatically if quick stop is activated in the drive, e.g. by a
device command or as response to an error, and in the event of controller inhibit or pulse inhibit.

Note!
In the Lenze setting, the mode 0 is preset to get into a safe state after the mains is
switched on.

Danger!
In this mode, the input bMBrakeReleaseBrake should be permanently set to FALSE unless
manual release (supervisor operation) is required.
If the bMBrakeReleaseBrake input is set to TRUE, the brake is released immediately, even
if the controller is inhibited!