Rockwell Automation 2755-DM9, -DM9E High Speed Decoder - Manual (Page 62)

Chapter 4
Configuring Your Decoder
4–35
3) Match-Complete: Selecting the match complete option will turn on the
output module when the number of matches made to any one or combination
of the selected match codes is equal to the quantity specified in the MATCH
COMPLETE field.
4) Read (Package): In the continuous scanning mode, an output will be
turned on when the following conditions are met:
•
Fields per scan parameter is met.
•
Each field is valid.
•
Scan capture count parameter is met.
In the triggered mode of operation, there is an additional requirement:
•
Fields per package count must be met.
5) No-Read (Package): Selecting the no-read option will result in the output
module being turned on whenever a no-read condition occurs. A No-Read
condition occurs whenever a valid package is expected but not found. A
No-Read condition will also occur whenever the No-Read timer times out
before there is a valid package read. No-read conditions do not occur if the
continuous trigger mode of operation is selected.
Note: A No-Read will also occur if there is a valid read and the buffer to the
host is full at the end of a trigger. Under these circumstances, the No-Read
condition indicates that the decoder cannot process the bar code without
overwriting data in the buffer.
6) Read and No-Match: Selecting the read and no-match option will result in
the output module being turned on whenever a symbol is read but does not
match any code provided in the match code table.
7) No-Read or No-Match: Selecting the no-read or no-match option will
result in the output being turned on whenever a no-read or a no-match
condition (with any code provided in the match code table) occurs. If the
data buffer overflows and data is lost, the No-Read or No-Match output will
also be turned on.
8) Auto Load: The Auto Load feature provides the ability to automatically
fill the Match Table entry with bar code fields read from a valid package.
After selecting Auto Load, SAVE the configuration and perform a
RESTART. When a valid package is decoded, the bar code fields (32
characters max.) are sequentially loaded into the Match Table for each entry
that has Auto Load selected until:
•
All entries (designated as Auto Load) are filled.
-or-
•
The Fields /Package requirement has been satisfied. If the number of
fields to be filled exceeds the fields per package setting, only the number
of fields equal to the fields per package setting will be filled. You can fill
remaining fields by saving the new configuration and restarting.