- Studio 5000 Logix Designer
- Tasks, programs, and routines
- Add-On Instructions
- Controller Organizer
- Logical Organizer
- Alarms
- Tag-based alarms
- Tag Editor and Data Monitor
- Configure settings for Tag Editor and Data Monitor
- Equipment phases
- Equipment Sequences
- Equipment Sequence Diagrams
- Ladder Editor
- Structured Text Editor
- Sequential Function Chart Editor
- Define the steps of an SFC process
- PlantPAx instruction properties
- Controller Properties
- Editing Controller Properties
- Controller Security
- Source Protection
- License Source Protection for Routines and Add-On Instructions
- Module Information
- 1756 ControlLogix I/O Modules
- Instruction Set
AuxFeedbackNoiseFault
Applies to: Servo Drive axes.
AuxFeedbackNoiseFault is a Boolean attribute. It is set if the servo module has detected simultaneous transitions of the feedback A and B channels ("feedback noise"). When the feedback device is an encoder, feedback noise is most often caused by loss of quadrature in the feedback device itself (as shown in the figure, below) or radiated common-mode noise signals being picked up by the feedback device wiring.
AuxFeedbackNoiseFault is a recoverable fault.
To recover from an AuxFeedbackNoiseFault:
- Fix the underlying problem: either the connection or the device.
- Be sure your program or fault handling routine contains either a:
- Fault Reset (MAFR) instruction, to clear all motion faults for an axis, or
- Shutdown Reset (MASR or MGSR) instruction to return to the axis ready operating state.
The occurrence of an AuxFeedbackNoiseFault sets bit #7 of the respective DriveFault or ServoFault attribute, the PhysicalAxisFault attribute and bit #0 of the AxisFault attribute.
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