User manual

Publication 1768-UM001C-EN-P - November 2007
112 Maintain Nonvolatile Memory
Preventing a Major Fault
During a Load
If the major and minor revisions of the project in nonvolatile memory do not
match the major and minor revisions of the controller, a major fault may occur
during a load.
Using a CompactFlash
Reader
All CompactLogix controllers support the FAT16 file system used with the
CompactFlash card.
Typically, you do not have to manage the files on a CompactFlash card. The
card automatically loads the project that you most recently stored. For
additional flexibility, the file system also lets you:
• manually change which project loads from the CompactFlash card.
• manually change a project’s load parameters.
Additional Resources
For more information about the maintenance of nonvolatile memory, refer to
The Logix5000 Controllers Common Procedures Programming Manual,
publication 1756-PM001
.
Project Load and Controller
Controller Consequences
Does not use a
CompactFlash card
Make sure that the major and minor revisions of the project
in nonvolatile memory match the major and minor revisions
of the controller.
The nonvolatile memory of the controller stores only the
project. It does not store the firmware for the controller.
Uses a CompactFlash card The CompactFlash card stores the firmware for projects
≥ 12.0. Depending on the current revision of the controller,
you may be able to use the CompactFlash card to update the
firmware of the controller and load the project.
ATTENTION
Do not remove the CompactFlash card while the controller is
reading from or writing to the card, as indicated by a flashing
green CF status indicator. This could corrupt the data on the
card or in the controller, as well as corrupt the latest firmware
in the controller.