Rockwell Automation 842E CM Integrated Motion Encoder on EtherNet/IP - Manual (Page 49)

Rockwell Automation Publication 842E-UM002A-EN-P - November 2013 49
Diagnostics and Troubleshooting Chapter 6
Faults and Alarms There are four ways to identify and view faults and alarms:
• Fault and Alarm log
• Quick View pane
• Tag Monitor, see the individual fault-related attributes
• Status Indicators
For more information, see MOTION-UM003 or Appendix C.
Troubleshoot Faults
The controller may exhibit the following types of motion faults.
Table 1 - Encoder FLT Fault Code
Encoder Fault and Alarm Subcodes
The following table shows the sensor encoder fault and alarm subcodes
communicated through the Cyclic Data Channel of the controller.
Subcodes will appear in the Axis Fault Log.
Type Description Example
Instruction error Caused by a motion instruction:
• Instruction errors do not impact controller operation.
• Look at the error code in the motion control tag to see
why an instruction has an error.
• Fix instruction errors to optimize execution time and
make sure that your code is accurate.
See Error Codes (ERR) for Motion Instructions, publication
MOTION-RM002.
An instruction with a parameter out
of range.
Fault Caused by an anomaly with the servo loop:
• You choose whether motion faults give the controller
major faults.
• Can shutdown the controller if you do not correct the
fault condition.
• Loss of feedback.
• Actual position exceeding an
overtravel limit.
Exception code on
display Exception text Problem Possible solutions
FLT S47 – FDBK DEVICE
FAILURE Feedback Device
Failure The feedback device
has detected an
internal error. • Check feedback cable connectors
• Cycle control power
• Replace encoder if fault continues