Rockwell Automation 2755 Enhanced Decoder Series B User Manual

Page 148

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10–13

Configuration: Host Message Replacement Rules

Publication 2755-833

Alignment

Field Type Options

Select

Left
Right

Determines whether the data in the host message should align to the
left or right edge of the field. The default is Right. As described
above, fill characters will be applied before the text (pushing the text
to the far right) in right justified fields, and after the text (pushing the
text to the far left) in left justified fields.

Fill Character

Field Type Options

Edit ASCII

Any ASCII Character 0–255
0 = None

Specifies a character to insert in the field when its length is less than
the minimum field length selected above. For example, if the result
of a successful replacement is the ABCD, with a minimum field
length of nine, left alignment, and a fill character of ASCII 35 (#),
the resulting field would look like:

ABCD#####

Appendix I contains a complete chart of ASCII characters and their
values.

Host Message Field Number

Field Type Options

Edit Numeric

1 through 16
All

Specifies to which of the 16 available field numbers the currently
displayed rule applies. The default value is All. Other allowable
values include the numbers 1 through 16.

Since rule processing applies to the rules in numerical order (1
through 16), once a field is satisfied by a rule, no other rule with the
same host message field number will be processed.

Note: Using a combination of All in the symbol number field and
All in the host message field number field within a rule creates a
special situation in which the decoder will attempt to match the rule
using only those symbols that have not previously satisfied this rule
or any other.

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