Publication 2098-IN005C-EN-P — March 2008
104 Troubleshooting Your Ultra3000 Servo Drive
Troubleshooting for
SERCOS Drives
These troubleshooting tables apply to Ultra3000-SE drives
(2098-DSD-xxx-SE and 2098-DSD-HVxxx-SE).
SERCOS Module Status Indicator
SERCOS Network Status Indicator
SERCOS Module
Status Indicator
Status Potential Cause Possible Resolution
Steady green Normal Drive is enabled. Normal operation when drive is enabled.
Flashing green Standby Drive is not enabled. Normal operation when drive is disabled.
Flashing red-green DC Bus Undervoltage The dc bus voltage is low.
• Normal operation when using auxiliary
power (main ac power is not applied).
• When using main ac power, refer to the
section Error Codes to continue
troubleshooting.
Flashing red Minor fault Drive is faulted, but the fault can be cleared.
Refer to the section Error Codes to continue
troubleshooting.
Steady red Unrecoverable fault
Drive is faulted, and the fault cannot be
cleared.
Contact your local Allen-Bradley
representative.
SERCOS Network
Status Indicator
Status Potential Cause Possible Resolution
Steady green Communication ready No faults or failures. N/A
Flashing green
Establishing
communication
System is still in the process of establishing
SERCOS communication.
Wait for steady green status indicator.
Node address setting on the drive module
does not match SERCOS controller
configuration.
Verify proper node switch setting.
Flashing red No communication
(1)
Loose fiber optic connection. Verify proper fiber optic cable connections.
Broken fiber optic cable. Replace fiber optic cable.
Receive fiber optic cable connected to
SERCOS transmit connector and vice versa.
Check proper SERCOS fiber optic cable
connections.
(1)
Refer to Fiber Optic Cable Installation and Handling Instructions, publication 2090-IN010, for more information.
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