Mannesmann Rexroth DDS 2.1 - Page 62

• DOK-DIAX02-DDS02.1*ANA-ANW1-EN-E1,44 • 12.96
60
7. Commissioning the functions of the digital AC servo drive
Error reaction and
holding brake control
The reaction of the holding brake under different preset error reactions
is shown in Fig. 61.
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. 61: Reaction of the holding brake under different error reactions.