VI.2
Removing faults
The table below should be regarded as a “First-aid” box. Depending on the conditions in your
installation, there may be a wide variety of reasons for the fault.
In multi-axis systems there may be further hidden causes of a fault.
Our applications department can give you further assistance with problems.
Fault
possible causes
Measures to remove the cause of the fault
message:
communication
fault
—
wrong cable used
—
cable plugged into wrong position
in servo amplifier or PC
—
wrong PC interface selected
—
use null-modem cable
—
plug cable into the correct
sockets on the servo amplifier
and PC
—
select correct interface
message:
undervoltage
—
supply voltage not present or too low
when servo amplifier is enabled
—
only enable the servo amplifier
when the mains supply voltage
has been switched on
delay > 500 ms
message:
overvoltage
—
regen power is insufficient. regen power
limit was reached and the regen resistor
was switched off. This causes excessive
voltage in the DC-link circuit.
—
supply voltage too high
—
shorten the braking time RAMP
use an external regen resistor
with a higher power rating and
adjust the regen power parameter
—
use mains transformer
message:
mains BTB/RTO
—
enable was applied, although the
supply voltage was not present.
—
at least 2 supply phases are missing
—
only enable the servo amplifier
when the mains supply voltage
has been switched on
—
check electrical supply
message:
brake
—
short-circuit in the supply cable for the
motor-holding brake
—
motor-holding brake is faulty
—
fault in brake cable
—
no brake connected, although the
brake parameter is set to "WITH"
—
remove short-circuit
—
replace motor
—
check shielding of brake cable
—
brake parameter set to "WITHOUT"
message:
output stage fault
—
motor cable has short-circuit/ground short
—
motor has short-circuit / ground short
—
output module is overheated
—
output stage is faulty
—
short-circuit / short to ground in the
external regen resistor
—
replace cable
—
replace motor
—
improve ventilation
—
return the servo amplifier to the
manufacturer for repair
—
remove short-circuit / ground short
message:
heat sink
temperature
—
permissible heat sink temperature
exceeded
—
improve ventilation
message:
aux. voltage
—
the aux. voltage produced by the servo
amplifier is incorrect
—
return the servo amplifier to the
manufacturer for repair
62
SERVOSTAR™ 600 Installation-manual
Appendix
02.99
Kollmorgen