Rockwell Automation 2755-SNx Adaptascan Bar Code Readers User Manual
Page 349

17–27
Communicating with PanelView 900
t
Terminals on a DeviceNet Network
Publication 2755-6.8
Read Bar Code Data Tag Configuration
The dialog box for the bar code display object is shown below. The
display is configured as an
ASCII
string with an embedded variable
(bar code data). The Field Width is set to 24 characters and is based
on the expected maximum bar code data length in characters. The
tag name is Bar_Code_Data.
By selecting the Edit Tag option, you can edit the tag data as shown
below.
The tag data type is “Character Array”. It is an explicit-client read
message with the Class, Instance and Attribute values as shown. To
read bar code data, the bit offset must be set to 16. The offset is
necessary since the first two bytes represent the length of the
requested data.
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