Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL - Manual (Page 146)

7–25 Creating Messages
Publication 2706-817
Read Tag
The Read Tag specifies the name of the tag address from which the
terminal will read the display data. Select a tag from the Read Tag
list box or type in a new Read Tag name. Valid data types for the
read tag are unsigned/signed integer or BCD.
Note: It is easier to create an application if all its tags are entered in
the Tag Editor before you start to write messages. If a new Read Tag
name is used, its parameters must be edited when it is assigned.
If the variable will be scaled, needs different data limits, or has a new
Read Tag assigned:
1. Put the insertion pointer in the Read Tag box.
2. Select the Edit Tag button to bring up the Tag Form dialog.
3. Edit the tag’s attributes (see the section starting on Page 8–2).
4. Select OK.
Slave devices
Slave devices support the display of Numeric Display variables in
messages. They are updated while the slave message is actively
displayed.
ASCII Triggering devices
Tag Node Name and Address attributes are ignored by an ASCII
Triggering device. They may be omitted when creating applications
for use with such a device.