Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL - Manual (Page 55)

4–7 Planning an Application
Publication 2706-817
1 This table shows the brightness level corresponding to each value in
Special Message 9908’s Ctrl-V command:
Value 0 1 2 3 4 5 6 7
Levels 12% 25% 38% 50% 60% 75% 87% 100%
A MessageView terminal can accept commands from one of these
two types of controlling devices:
•
a logic controller such as an Allen-Bradley PLC or SLC
A logic controller communicates with a MessageView terminal
through the Remote I/O port on the daughterboard card.
Terminals with daughterboard cards are Catalog Nos.
2706-M1D1, -M1N1 and -M1F1.
•
an ASCII Triggering device, such as an Allen-Bradley computer
product or SLC BASIC Module. See Page 5–7 for a list.
An ASCII Triggering device communicates through the RS-232
port on the main board of the terminal. It is used with terminals
that do not have daughterboard cards: Catalog Nos. 2706-M1D,
-M1N and -M1F.
MessageView features supported by a controlling device
A MessageView terminal can support the following features when
controlled by either type of device:
•
displaying triggered messages with or without embedded
variables
•
queuing messages
•
chaining messages
•
supporting Special Messages
•
supporting hidden messages to be sent to the Historic Event Stack
when triggered
•
displaying messages with Numeric Entry variables embedded, in
421N and 421F terminals
•
implementing Handshaking for latched function keys, in 421F
terminals
•
scaling Numeric Display and Numeric Entry variables
•
returning Message Numbers to the controlling device
•
displaying Startup and Background messages
•
supporting Debug Mode
•
supporting Simulate Mode
Controlling Devices