Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 145)

10–10 Configuration: Host Message Replacement Rules
Publication 2755-833
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 a rule.
A rule in which the host message field number is set to All will try to
process every symbol to satisfy the search criteria until all of the host
fields are satisfied.
Important: Do not set the host message field number to All unless:
•
The Number of Fields in Message parameter is set to 1 on the
Host Message Format screen.
OR
•
The Number of Fields in Message parameter is set to All on the
Host Message Format screen and the Symbols per Package
parameter is set to 1 on the Scanner Control screen
OR
•
The Symbol Number parameter is set to All.
Other configurations will result in multiple copies of the same data
being set as different fields in the host message.
For example, if the Number of Fields in Message parameter is set to
a number greater than 1, with the host message field number set to
All, then the same symbol will be processed through a single rule
multiple times. For the purposes of this example, assume the number
of fields in message value is set to 3, and the user has enabled rule
number 1 as shown below.