Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 177)

13–8 Configuration: AUX Terminal Data Entry
Publication 2755-833
Displaying Host Messages
The AUX terminal can display text messages that are sent from the
host using the Display Text Message command. Typically, this
command is used during manual data entry to prompt the user to
enter bar code data or take some other action. The last section in this
chapter describes manual data entry operations.
To accommodate the many variations in display terminals, messages
sent from the host always display in position 1.
If the host sends the Display Text Message command to the decoder
with a text string length set to zero, the decoder will display the
Default Prompt Message instead (if defined). The text string from
the host and the default prompt message are always preceded by a
carriage return and line feed, and display at the beginning of the line
in position 1.
The following parameter defines the Default Prompt Message:
Defines 1 to 20 character prompt message.
Initially, the default prompt message is undefined.
The amount of data to be displayed is restricted by the size of the
terminal display. For example, most terminals support an 80
character display. Formatted data (other than host messages) that
exceeds the size of the display is truncated. Text messages from the
host that are longer than the size of the display will truncate.
Processing No-Reads
This section includes some examples to illustrate how the decoder
handles subsequent packages while waiting for you to respond to a
no-read. All examples assume that manual data entry is enabled only
for no-reads and the Default Prompt Message is defined as ”Enter
Carton Data:”.
Example 1: What happens if you respond to a no-read before the
next package arrives?
If you complete the data entry process for a no-read before the next
package arrives, the package count of the manually entered data
(which is sent to the host if the data is host formatted) will be the
same as the no-read package.