Installation manual

Danaher Motion Kollmorgen 08/04 Troubleshooting
SERVOSTAR S Installation M-SS-001-01 Rev. T 89
Bus OverVoltage
An over-voltage condition shuts down the drive and displays a
lower-case o in the status display. This fault will occur mostly during
regen operation where the bus is raised to higher values than that
produced by the power supply.
Bus UnderVoltage
An under-voltage condition shuts down the drive and displays a u in
the status display. This fault normally occurs when the incoming
line voltage drops out or a fault occurs in the power supply.
PowerStage Fault (OverCurrent)
Hardware circuitry monitors load short-circuit, transistor failure, and
instantaneous OverCurrent. In general, toggling the Remote Enable
cannot reset a power stage fault. Power must be cycled. A flashing
P in the status display indicates this condition.
Feedback Loss
Hardware is used to detect a wire-break condition in encoder based
systems or the presence of the Sine and Cosine resolver feedback
signals in resolver based systems. The SERVO
STAR disables and
displays an r in the status display when either of these signals is
not present.
Low-voltage power supply faults
Out of tolerance values on the ± 12 VDC analog supplies will cause
an A to be displayed and cause the drive disable.
OverSpeed fault
Software continuously monitors the actual (feedback) speed. If the
motor speed exceeds the VOSPD limit, a J will be displayed and
the drive will be disabled. This normally occurs when there is an
improperly tuned system and the load overshoots its commanded
speed.
No compensator
In case the SERVOSTAR cannot design a compensator, such as
after a RSTVAR command, CLREEPROM, or any change in the
motor or drive parameters, a flashing minus sign (-) will be
displayed and will cause the drive to disable. This display normally
indicates that the drive does not have a compensation file loaded.
Memory reliability
During the initialization process upon power up, the run time,
variables memory (RAM - Random Access Memory), and the
program memory (EPROM - Electrically Programmable Read Only
Memory) are tested.
If a RAM fault is detected
An I is displayed and the drive is halted. If an EPROM fault is
detected, a c is displayed and the drive is halted.