Rockwell Automation 2706-M1 MESSAGEVIEW 421 HARDWARE MANUAL - Manual (Page 125)

Glossary G–5
Publication 2706-816 – November 1996
M –
Master Device – A device which controls one or more Slave
Devices. It sends Messages to be displayed by its slaves, and
controls the appearance of the message in the slave display. A
MessageView terminal with a Daughterboard and Firmware that
supports Slave Port can address up to 127 slave devices through its
RS-232 port.
Menu – A list of related commands in the Front Panel Editor.
Highlight a menu name and use the Enter key to open a list of
commands or options relating to the menu name.
Message – The basic unit of a MessageBuilder Application. It
contains any or all of the following: text, embedded Variables,
Graphics and enabled Function Keys. A message appears in the
MessageView terminal’s display after it has been Triggered by the
Controller. Messages are not always displayed when they are
triggered.
MessageBuilder Software – A Microsoft Windows based program
used to develop an Application that will run in a MessageView
terminal.
MessageView Terminal – An Allen-Bradley device which runs a
MessageBuilder Application and controls a process. The terminal
provides an operator display interface to a Controller and often to
other Devices when the application is executing.
N –
NEMA – Acronym for National Electric Manufacturers
Association.
Node – A point on a network to which a Device can be connected.
The MessageView terminal may be at a node on a Remote I/O
network or an ASCII Triggering Device network.
Node Address – A unique integer assigned to each node on a
network. Data transfer between Devices on a network requires a
destination address.
Numeric Keypad – On MessageView 421N and 421F terminals,
keys the operator can use to input data in Numeric Entry variables.