The Use Of Brake - Delta ASDA-B2-F Series User Manual

Control Mode of Operation

6.5 The Use of Brake

When operating brake via servo drive, if DO.BRKR is set to OFF, it means the brake is not
working and the motor is locked. If DO.BRKR is set to ON, it means the brake is working and the
motor can operate freely. The operation of brake has two kinds. Users can set delay time by
6
MBT1 (P1-42) and MBT2 (P1-43). It is usually applied in Z axis in order to reduce the heat when
servo motor puts up resistance which shorten its lifetime. In order to avoid the error of the brake,
it must be operated when the servo drive is off. If users operate brake, the brake needs to be
used during the decelerating process to make the braking force of the brake and the motor
remain in the same direction. By doing so, the drive decelerates normally due to the braking
force from the brake. If the brake is used when the drive is accelerating or at constant speed, the
drive needs to generate greater current to resist the braking force which may cause the alarm of
overload protection.
The output timing of DO.BRKR:
1. When Servo Off, motor goes through the time set by P1-43 and its speed is faster than the
setting in P1-38, DO.BRKR is OFF (the brake is locked.).
2. When Servo Off, motor has not reached the time set by P1-43 but its speed is slower than
the setting in P1-38, DO.BRKR is OFF (the brake is locked.).
6-26
SON
OFF
(DI Input)
BRKR
OFF
(DO Output)
MBT1(P1-42)
Motor Speed
Figure 6-14 Timing Diagram of Brake
ON
OFF
ON
OFF
MBT2(P1-43)
ZSPD(P1-38)
ASDA-B2-F
September, 2015