From OpenSCADAWiki
In the same way you can create message archivers of different nature, for example — the operator actions. For which it is enough to define the category of these messages and to form for them a template or regular expression rule. You can obtain the standard categories and their templates, or regular expression rules, on the message archiving page; or can study real messages on the main page of the subsystem "Archives-History", obtain here for information on categories and set up a template or regular expression rule. You can even create an archiver to archive all program messages, but doing so is not recommended because of large archives size and long access to them later.