Rockwell Automation 1768-L45S Compact GuardLogix Controllers - Manual (Page 113)

Rockwell Automation Publication 1768-UM002C-EN-P - April 2012 113
Chapter
9
Store and Load Projects Using Nonvolatile
Memory
Using Memory Cards for
Nonvolatile Memory Compact GuardLogix controllers, revision 18 or later, support a 1784-CF128
CompactFlash card for nonvolatile memory. Nonvolatile memory lets you keep a
copy of your project on the controller. The controller does not need power or a
battery to keep this copy.
You can load the stored project from nonvolatile memory to the user memory of
the controller:
• On every powerup
• Whenever there is no project in the controller and it powers up
• Anytime through RSLogix 5000 software
Topic Page
Using Memory Cards for Nonvolatile Memory 113
Storing a Safety Project 115
Loading a Safety Project 115
Manage Firmware with Firmware Supervisor 116
TIP The Compact GuardLogix controller does not require a battery. When it is being shut
down, the controller uses internal nonvolatile memory to store its program. Energy
stored in the 1768 power supply maintains controller power long enough to store
the program to internal nonvolatile memory, not the external CompactFlash card.
IMPORTANT Nonvolatile memory stores the contents of the user memory at the time that
you store the project:
• Changes that you make after you store the project are not reflected in
nonvolatile memory.
• If you make changes to the project but do not store those changes, you
overwrite them when you load the project from nonvolatile memory. If this
occurs, you have to upload or download the project to go online.
• If you want to store changes such as online edits, tag values, or a ControlNet
network schedule, store the project again after you make the changes.