Rockwell Automation Publication 1769-UM022C-EN-P - June 2018
187
Chapter
13
Store and Load Programs with a Secure Digital
Card
Use SD Cards for Nonvolatile
Memory
Compact GuardLogix® 5370 controllers support a Secure Digital (SD) card for
nonvolatile memory:
• 1784-SD1 card - Ships with Compact GuardLogix 5370 controller and
offers 1 GB of memory. You can order more 1784-SD1 cards if desired.
• 1784-SD2 card - Available for separate purchase and offers 2 GB of
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.
Topic
Page
Use SD Cards for Nonvolatile Memory
Manage Firmware with Firmware Supervisor
IMPORTANT
The life expectancy of nonvolatile media is dependent on the number of
write cycles that are performed. Nonvolatile media use a wear leveling
technique, or technology for prolonging the service life, but avoid frequent
writes.
Avoid frequent writes when logging data. We recommend that you log data
to a buffer in the memory of your controller and limit the number of times
data is written to removable media.