• DOK-DIAX02-DDS02.1*ANA-ANW1-EN-E1,44 • 12.96
65
7. Commissioning the functions of the digital AC servo drive
Fig. 65: Time sequence of holding brake status corresponding to controller enable
status
ENA3A-Abb16/InbetrDDS
External
controller enable
via NC control
Speed command
value = 0
Motor
torque
Holding brake
closes
Time axis
1
0
1
0
1
0
1
0
0 100 200 300 400 500
t/ ms
n<10 rpm
n>10 rpm
1) 2)
3)
1)
The holding brake closes when the motor speed falls below 10 rpm.
2)
The holding brake closes after 400 ms when the speed is > 10 rpm.
3) The holding brake opens immediately the controller enable signal is applied.
4) Caution: The motor torque is disabled 100 ms after the holding brake has closed.
4)
ENA3A-Abb43/InbetrDDS
Error
Speed command
value 0
Motor
torque
Holding brake
closes
Time axis
1
0
1
0
1
0
0 100 200 300 400 500
3)
t/ ms
n<10 rpm
n>10 rpm
1)
2)
1)
1) When error reaction 2 is set the holding brake closes immediately. The motor torque is disabled at once.
2) Error reaction 0 or 1:
The holding brake closes when the motor speed drops below 10 rpm. The holding brake will close
after 400 ms even when the speed is > 10 rpm.
3) Once the source of the error has been eliminated and the controller enable signal has been reset,
the holding brake releases automatically.
To ensure safe opening of the holding brake, the drive's internal circuitry provides a command value
of 0 for 100 ms.
0
100
Controller enable
(RF)
1
0
1
0
Fig. 66: Reaction of the holding brake under different error reactions.
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