Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL - Manual (Page 229)

10–21 Terminal and Communication Setup
Publication 2706-817
The terminal uses control tags to specify addresses for global
attributes.
1. Select the Control Tags tab from the Terminal Setup dialog.
2. Assign tags as needed.
3. Select the OK button to save all the settings from the Terminal
Setup dialog and return to the main Message Editor Table View.
Or select another tab and continue setting up the terminal for the
application.
Or select the Cancel button to return to the Message Editor Table
View without saving any Terminal Setup settings.
Note: If the Return Message Number attribute is enabled in the
Advanced tab, then one or more of the three Return Number tags in
this tab must be defined.
Message Tags
The Value Trigger tag address contains the message number of the
most recently triggered message. The terminal scans the integer
value and displays or queues the message that has that message
number. This tag is required if the Message Queue was enabled in
the Advanced tab dialog.
The only valid data type for this tag is unsigned integer.
Note: In an ASCII Trigger application, only a tag name is required
for the value trigger. Node name and address may be left blank. See
Page 5–8 for the Ctrl-T command used to trigger a message.
Defining Control Tags