Absolute Position Loss Without Apr Faults; Apr Fault Conditions - Allen-Bradley ControlLogix Reference Manual
Integrated motion on the ethernet/ip network
Hide thumbs
Also See for ControlLogix:
- User manual (203 pages) ,
- Installation instructions manual (16 pages) ,
- User manual (165 pages)
Table of Contents
Chapter 2
Behavior models used in CIP Motion
Absolute Position Loss without APR
Faults
APR Fault Conditions
44
SERCOS versus CIP
For a SERCOS axis with absolute feedback, the drive scaling function and
absolute position is maintained in the drive and therefore may be easily restored in
the control after a power cycle or download of a new project by simply reading the
position from the drive.
By contrast, a CIP Motion axis supports controller based scaling where absolute
position is maintained in the controller's firmware. Without the work of the APR
feature, absolute position would be lost after a power cycle or project download.
See also
APR Fault Conditions
APR Fault Examples
APR Fault Generation
APR Fault Attributes
The Absolute Position Recovery is not retained after the following:
•
A project is exported, saved as a .L5K or .L5X, and imported (downloaded).
•
A major non-recoverable fault (MNRF).
•
A power loss.
•
On a Control Logix 5570 controller without an ESM
Tip:
The APR can potentially be restored from a Secure Digital Card on a ControlLogix
5570 Controller (if a 1756-ESM is not present).
•
A download of an axis that does not have its home bit set.
•
Power cycling of an incremental encoder.
See also
Absolute Position Recovery
APR Recovery Scenarios
APR Fault Examples
Absolute Position Recovery (APR) faults are generated during these events and
when one of the conditions defined below occurs.
In order for an APR Fault to occur, the axis must be in the homed state. The Axis
Homed Status Bit must be set.
Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018
on
page 44
on
page 47
on
page 45
on
page 279
on
page 43
on
page 48
on
page 47
Hide quick links:
Table of Contents
Related Manuals for Allen-Bradley ControlLogix
Related Products for Allen-Bradley ControlLogix
- Allen-Bradley ControlLogix DeviceNet
- Allen-Bradley ControlLogix 5570 series
- Allen-Bradley ControlLogix 5570
- Allen-Bradley ControlNet PLC-5
- Allen-Bradley ControlLogix ControlNet B Series
- Allen-Bradley ControlLogix DeviceNet C Series
- Allen-Bradley ControlLogix DeviceNet D Series
- Allen-Bradley ControlLogix B Series
- Allen-Bradley ControlLogix 1757-SRM
- Allen-Bradley ControlNet ControlLogix 1756
- Allen-Bradley ControlNet GuardLogix 1756
- Allen-Bradley ControlNet CompactLogix 1769
- Allen-Bradley ControlNet Compact GuardLogix 1769
- Allen-Bradley ControlNet SoftLogix 1789
- Allen-Bradley ControlLogix 1756-IF6I
- Allen-Bradley CompactLogix 5370