Rockwell Automation 2755-SNx Adaptascan Bar Code Readers - Manual (Page 217)

11–17 Communicating with a PLC-5 Processor on a DeviceNet Network
Publication 2755-6.8
5. Click the New button to create a message field.
6. Under Symbol Source, select Bar Code Reader 1.
7. Under Bar Code Label & Symbols, select Symbol 1.
8. Check (enable) the Match Exactly check box.
9. Click the Edit button to open the Message Field Edit dialog.
10. Under Replacement Strings, type nr in the Fail: field.
Bar code data is sent to the 1771-SDN Scanner on a valid read;
the Fail string send the characters nr when a no read occurs.
11. Under Data Format, type 4 in the Length box.
Important: The Length must match the number of
characters in the bar code symbol. This
application uses 4 character, Interleaved 2 of 5
symbols.
12. Click OK to return to the Message Field dialog.
13. Click OK to return to the Message dialog.