Rockwell Automation 2711E-ND1 Reference Manual PanelBuilder 1400e - Manual (Page 59)

52 Local Message Displays
Publication 2711E-6.15 – November 1998
How a Local Message Is Triggered
A message is triggered when the value of the Message Control
changes. This value must correspond to the trigger value of a local
message. For example, a control value of 19 would cause the
message with trigger value 19 from the Local Message list to appear
in the display. If the control value changed to 27, the message with
trigger value 27 would appear, replacing the previous message. The
Local Message Display is cleared when the trigger value is 0. If no
matching trigger value is found, the display is cleared and displays
“????”.
Triggering Messages on Multiple Local Message Displays
Each application has only one local message list but you can have
several Local Message Displays for different purposes. To trigger
different messages for different displays, create a subset of the local
message list for each display.
To trigger different messages on multiple Local Message Displays,
create the display objects using controls with different tags or
expressions that do not overlap addresses. Then create all messages
using the Local Message editor.
The PLC can then write different values to each object control,
causing different messages to appear in each display.
For an example of using Local Message Displays with a Scrolling
List Object, see “Scrolling Lists” later in this manual.
Configuring the Local Message Display
Configure the Local Message Display according to this table:
Field Meaning
Name Assign a name, up to 15 characters, to document the object for
printed reports. This increases the application’s size by 1 byte
per character.
Control Message Control records the trigger value of the local
message to be displayed. You can assign a tag or expression to
the Message Control.
The control must be able to accommodate the trigger values of
all messages to be displayed for the object.