Lenze E94AxPExxxx - Manual (Page 574)

12 Basic drive functions
12.12 Brake control
574
Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
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12.12.5.2 Process when brake is released
The following process occurs when a basic function is requested which causes the drive to traverse:
1. The controller inhibit is deactivated.
2. The magnetic field required for the holding torque is created in the motor (is already available
when a synchronous machine is used).
3. The feedforward control torque is loaded into the speed controller.
4. If the actual torque has reached 90 % of the feedforward control torque:
• The output BRK_bReleaseBrakeOut is set to TRUE for releasing the brake.
• Monitoring of the motor brake control module is deactivated temporarily.
• Monitoring of the status input is deactivated temporarily (if switched active via
C02583 ).
• The brake opening time starts to elapse.
5. After the brake opening time has elapsed:
• The output BRK_bBrakeReleased is set to TRUE.
• The requested basic function is enabled.
6. After the additional waiting time set for the status monitoring in C02591 has elapsed:
• Monitoring of the motor brake control module is active again.
• Monitoring of the status input is active again (if switched active via
C02583 ).