Section 4.1 Introduction
Section 4.2 Trigger Message and Update Variables
Name
[CTRL][T]
If not used, the message is shown as a Priority Message on all displays.
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Chapter 4
InView Protocol
The purpose of this chapter is to show the protocol that is required to trigger
messages and update variables on InView displays with the InView protocol.
In general, messages are downloaded through the software and stored within the
display memory. Up to 4000 messages and 100 (0 to 99) variables can be created
with the InView software.
Messages are displayed using the Control-T function or Modbus ASCII.
One of three different methods can be used:
Priority messaging.
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Add a message.
Remove a displayed message.
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Variables are updated using the Control-V function or Modbus ASCII.
The two functions that are used to trigger messages and update variables are the
Control-T (CRTL-T) and the Control-V (CTRL-V). The CTRL-T function allows
for two different ways of displaying messages; priority messaging and
add/remove messages. The CTRL-V function is used to update variables on all
displays or a specific display.
Priority messaging displays the message number that was just transmitted to the
display. Using this function has precedence over any priority levels that are used
with add/remove messages. Add/remove messages allows for up to 64
concurrently running messages to be shown on the display. Messages are cleared
one at a time or all at once. These messages have priority levels assigned to them
that are used to determine how they are displayed.
The CTRL-T Function Frame
The CTRL-T function is used to trigger messages. This function requires an
ASCII decimal value to be used to trigger the desired message number. The
CTRL-T function has the ability for priority messaging, add a message, or
remove a message. Control-T Frame Format shows the format for the Control-T
function and Control-T Frame Description shows the acceptable values.
Control-T Frame Format
Optional
MSG#
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Function
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User's Manual 0300277-03 Rev. A
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