Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL - Manual (Page 162)

7–41 Creating Messages
Publication 2706-817
Chain
A message may be chained to another. That is, a message can trigger
another message by invoking its message number. A chained
message has exactly the same attributes as if it were not chained.
When the first message in a chain is triggered, it is displayed or
queued. After it is terminated, if the next message in the chain:
– has the same display line as the previous message, it has
priority over messages in the queue and is displayed
– has a different display line assigned, and that line is free, the
message is displayed
– has a different display line assigned, and that line is occupied,
the message is appended to the Message Queue.
•
Select the Enable check box, then select the chained Message
Number from the To: spin control.
•
Or highlight the current number and type the chained Message
Number.
Any message in the application may be chained to another. A chain
may even be circular, with the last message triggering the first
message. A circular chain can be useful in certain cases. To break the
chain:
•
tell the terminal operator to do a Powerup Reset, or
•
trigger Special message 9901, Clear Display.
ASCII Triggering devices
ASCII Triggering devices do not support embedded display variables
in chained messages.
A MessageView terminal with a Remote I/O daughterboard (Catalog
Nos. 2706-M1D1, -M1N1 or -M1F1) and firmware that supports a
Slave Port can act as a master device with up to 126 slave devices.
Each Slave device at a specific Node Address displays the messages
sent to its Node Address.
Slaved messages may contain variables, graphics and message
attributes set up by the MessageBuilder software, with the following
cautions:
•
A graphic must be preceded by a Ctrl-G, or the terminal will
replace the graphic with two spaces before sending the message
to the slave.
•
The terminal removes embedded data entry variables from a
message before sending the message to the slave.
Slaving