15 Appendix
5-8
Failure of internal
voltage 3
Replace the servo drive.
5-9
Failure of encoder
supply
Group 6: Short circuit in the power output stage
6-0
Short circuit in the
power output stage
Is the motor defective?
Is there a short circuit in the cable?
Is the power output stage defective?
6-1
Brake chopper
overcurrent
Check the external braking resistor for short
circuits. Check whether the resistance value is
too small.
Check the brake chopper output of the servo
drive.
Group 7: Overvoltage
7-0
Overvoltage DC bus
circuit
Check the connection to the braking resistor
(internal/external).
Is the external braking resistor overloaded?
Check the rating.
7-1
Overvoltage at power
input
Disconnect the device immediately from the
mains power supply and check the voltage at the
main power input.
Check the quality of the power supply (voltage
peaks).
Group 8: Angle encoder
8-0
Resolver/Hall angle
encoder error
See the measures for 08-2 to 08-8.
8-1
Rotating direction of
serial and incremental
position evaluation not
identical
Have the A and B tracks been mixed up?
Check the connection of the track signals.
8-2
Incremental encoder:
Z0 track signals error
Is the angle encoder connected?
Is the angle encoder cable defective?
Is the angle encoder defective?
Check the configuration of the angle encoder
interface.
The encoder signals are disturbed: Check the
installation for compliance with the EMC
recommendations.
8-3
Incremental encoder:
Z1 track signals error
8-4
Digital incremental
encoder: track signals
error
8-5
Incremental encoder:
hall signals error
8-6
Angle encoder
communication error
8-7
Master frequency input:
Incorrect signal
amplitude incremental
track
Product manual BL 4000-C
Page 270 of 298
