Motor Holding Brake (X2) - Kollmorgen AKD series Installation Manual

8.11.2 Motor Holding Brake (X2)

A 24 V holding brake in the motor can be controlled directly by the drive.
The brake only works with sufficient 24 V voltage level (=> p. 34 or => p. 35). Check
voltage drop, measure the voltage at brake input and check brake function (brake
and no brake).
This function does not ensure funtional safety. Functional safety requires and addi-
tional, external mechanical brake, operated by a safety controller.
The Hardware Enable (connector X8 pin4) does not initiate a controlled stop but
switches off the power stage immediately. Set parameter MOTOR.BRAKEIMM to 1
with vertical axes, to apply the brake immediately after faults or Hardware Disable.
The brake function must be enabled through a parameter. The diagram below shows the timing and functional
relationships between the controlled stop signal, speed setpoint, speed, and braking force. All values can be
adjusted with parameters; values in the diagram are default values.
The speed setpoint of the drive is internally driven down an adjustable ramp (CS.DEC) to 0 V. With default
values the output for the brake is switched on when the speed has reached 120 rpm (CS.VTHRESH) for at least
6 ms (CS.TO). The rise (t
brH
the various types of motor (see motor manual).
) and fall (t ) times of the holding brake that is built into the motor are different for
brL
AKD Installation | 8 Electrical Installation
Kollmorgen™ | March 2012 97