8basic functions – Lenze 8400 motec User Manual

Page 272

Basic functions

8.2

Holding brake control

272

Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05

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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.

• 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.

• After automatic brake activation and expiration of the brake application time, the controller is

inhibited automatically by the basic "Holding brake control" function.



Tip!
The 12 mode is the common mode to control the brake.

• In this mode, the bBrkRelease input should be permanently set to FALSE unless manual

release is required.

• When bBrkRelease = TRUE, the brake is permanently released and the automatic control

cannot apply the brake.

• Set "0: Not connected" in

if you use this mode and do not want a forced

release.

Mode 13: Semi-automatic control

From version 02.00.00

This mode is similar to mode 12 (automatic control). However, there are the following differences

compared to mode 12:

• The brake has to be released manually via the bBrkRelease input. The parameterisable upper

speed threshold is ineffective for releasing the brake.

• If the brake is released via the bBrkRelease input, the feedforward control gets active: Before and

during the release, feedforward control takes place according to the settings in

(bit 2 ... 4).

• If controller inhibit is pending, the brake is not released.
• If the controller is inhibited, the brake is applied immediately.

Related topics:

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