Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL - Manual (Page 231)

10–23 Terminal and Communication Setup
Publication 2706-817
3. Edit the tag’s attributes (see the section starting on Page 8–2).
4. Select OK.
Note: In an ASCII Trigger application, only a tag name is required
for message tags. Node name and address may be left blank.
Acknowledge Tags
The Acknowledge tag is the address where the terminal writes a 1
when its
ACK key is pressed in response to a message with the
Acknowledge attribute enabled.
The only valid data type for this tag is bit.
Note: If the controller is an ASCII Triggering device, the
Acknowledgement is sent back as part of the Ctrl-K message. See
Page 5–11.
The Handshake tag is the address where the terminal scans for a 1
to confirm that the
ACK key press was acquired by the logic
controller. If this tag is not defined, Acknowledge handshaking is
disabled.
The only valid data type for this tag is bit.
Note: An ASCII Triggering device does not support handshaking for
an Acknowledgeable message.
The Acknowledge Return Number tag is the address where the
terminal writes the message number of the most recent active
message on the display if:
•
the message has the Ack attribute enabled, and
•
the Return Message Number attribute is enabled in the Advanced
tab dialog.
The only valid data type for this tag is unsigned integer.
Note: If the controller is an ASCII Triggering device, the Return
Message Number is sent back as part of the Ctrl-K message. See
Page 5–11.
To enter these global acknowledge tags:
•
select the name of a tag from the list box, or
•
type a new tag name and select the Edit Tag button to define the
tag.