8basic functions – Lenze 8400 motec User Manual
Page 272
8
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:
Behaviour in case of pulse inhibit