Installation manual

Danaher Motion Kollmorgen Troubleshooting
SERVOSTAR
®
S and SERVOSTAR
®
CD Series 93
Fault Monitoring System
The SERVOSTAR’s microprocessor is constantly monitoring the status of
many different components. In general, the philosophy of the SERVOSTAR is
to latch all fault conditions so you can readily determine the source of the
problem. When a fault is detected, it is logged in the internal error log, indicated
in the Status Display, enunciated over the serial port, and in most conditions
causes a drive disable. Many faults can be reset by toggling the hardware remote
enable (REMOTE input).
The following provides a list of some of the more frequent faults the drive may
detect in the unit hardware and operating system.
• Motor OverTemperature: The Motor’s External Thermostat input is
monitored for an open circuit condition. You can define (using
THERMODE) what happens under this fault condition. The worst case
event is a power stage disable when an ‘H’ appears in the status
display, and the fault relay contacts (RELAY) are open.
• Hardware Position Limit Inputs: The IN1, IN2, IN3 Inputs are
constantly monitored. If INxMODE set these inputs for CW/CCW
hardware position limits, they are monitored for an open-circuit
condition. Although not necessarily an error condition, motor operation
can be affected by these inputs. The SERVOSTAR can ignore the
hardware position limits if you set LIMDIS = 1. The worst case event is
that further motion in the given direction is not allowed with an ‘L’
illuminated in the status display. If both CW and CCW position limit
inputs have detected an open-circuit condition, the SERVOSTAR
enters into Hold position state
(HOLD = 1).
• Drive OverTemperature: The internal heatsink temperature is
monitored for an unsafe condition. This condition causes a ‘t’ to be
displayed and disables the drive. The drive will eventually cool enough
to allow reset of this condition.
• RMS OverCurrent (FoldBack): The FoldBack detection system can
‘clamp’ the available output current. This is not a true fault condition,
but may cause undesired performance, due to the command current
being limited below what is required to achieve the desired
performance. This condition is indicated with a flashing ‘F’ in the
status display and can be detected by monitoring the FOLD switch
variable.