Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 141)

10–6 Configuration: Host Message Replacement Rules
Publication 2755-833
Character Description and Use
| A vertical bar (the shifted “\” character on the keyboard) instructs the rule
to match an incoming string if the character or expression on the left or
right of the vertical bar appears in the string.
Examples
A | B Matches “A” or “B”
abc|123 Matches “abc” or “123”
\ The backslash indicates that the following character, which would
normally be interpreted as a metacharacter, should instead be
interpreted as a literal ASCII character.
Note: The backslash is used differently in the Replace Patterns. See
Table 10.E.
Example
\. The period ( . ) will be interpreted as a period
rather than a
single character wildcard.