Rockwell Automation 2755-DM9, -DM9E High Speed Decoder - Manual (Page 91)

Chapter 6
Communicating With a Host
6–9
Field
Number of
Characters
in each
Field
Explanation
15. End Message 0, 1, or 2
Specifies the end of message control code:
•
None
•
CRLF
•
CR
•
LF
•
ETX
16. Checksum. 0, 1, or 2
Message checksum. There are four options:
•
None
•
Longitudinal Redundancy Check (1 Byte).
•
Checksum- Least significant byte first (2 Bytes).
•
Checksum- Most significant byte first (2 Bytes).
To help you program your host device, we have provided the following
examples. These example show the data transmitted by the decoder. In these
examples, the host protocol was setup as follows:
Start Character: #
Send Source Identifier: Yes
Source Identifier: 183
Header Message: Data From Scanner 1B3
Label Delimiter: =
Send Bar Code Type: Yes
Send Bar Code Data: Yes
No-Read Message: No-Read
Send Package Count: Yes
End of Message Character: CRLF
Transmission Check: None
Send No-Read Message: Yes
Example #1 - If one Code 39 label is decoded, the decoder would transmit
the following:
#183Data From Scanner 1B3=01001122334455==000013CRLF
Where 01 is the code type (code 39), 001122334455 is the bar code data and
000013 is the package count.
Example #2 - If two Code 39 labels are scanned on a single package, the
decoder would transmit the following:
#183Data From Scanner 1B3=01998877665=01001122334==000014CRLF
Where 01 is the code type (code 39), 998877665 is the data for the first bar
code, 001122334 is the data for the second bar code, and 000014 is the
package count.
Example Data Messages