Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL - Manual (Page 156)

7–35 Creating Messages
Publication 2706-817
Example of priorities in displaying a message:
The terminal display has a quarter display mode message on Line 2.
A half display mode message is value triggered. If it is assigned to:
•
Line 3, it is displayed at once.
•
Any, it is displayed at once on Line 3.
•
Line 1 or 2, it is put in the Message Queue until the first message
is terminated.
•
All, it is put in the Message Queue until the first message is
terminated.
•
Line 4, it cannot be displayed; this discrepancy is caught during
Validation of the application.
To display more than one message:
Assign messages to different lines if they are to be displayed at the
same time. The terminal can display:
•
four different messages in Quarter Display mode
•
two messages in Quarter Display mode and one in Half Display
mode
•
two messages in Half Display mode.
When messages require action by the operator, consider the
following:
•
Only one message may be displayed at a time that requires the
operator to use either:
– numeric keys, although one message can have up to 10
Numeric Entry variables (MessageView 421N or 421F
terminals)
– the ACK key (all terminal types)
•
In MessageView 421F terminals, only one message may be
displayed at a time that requires the operator to press a Function
key. However another message can be displayed that contains
either Numeric Entry variables or the Ack attribute.
Clearing messages from the terminal display
Wait Time
Select the Wait Time list box to specify the minimum time the
message will be displayed. Wait time may be 0 to 31 seconds; default
is 1 second.
Note: If Scroll is disabled and Auto Clear is enabled, Wait Time
cannot be 0. If it is 0, the application will not pass Validation.