Downloads/Software/Samples and Utilities
File Size: 1317 KB
Version: 1.4c
Updated: 09/02/2016

OptoTagPreserve copies variables from your PAC Control strategy running on a SNAP PAC controller and saves them in a password-protected binary file or a plain-text XML, OptoScript, or init.txt file.

The primary reason you would use this utility is to make it easier to preserve variable states when you need to update firmware on the controller. Updating firmware erases battery-backed data including persistent variables and variables initialized on strategy download. Use OptoTagPreserve before loading new firmware to archive tag values to the computer, and then restore them after firmware is loaded and the strategy has been downloaded.


  • Make sure the strategy is stopped before restoring tag values. If the strategy is running, unexpectedly changing values can cause unpredictable results with strategy operation.
  • Writing to a plain-text file requires that the strategy contain a special variable allowing plain text.

See the technical note included in the download for complete information on using the utility.


Note: Before you download, read the Legal Agreement.