Rockwell Automation 2706-MB1 MESSAGEVIEW 421 SOFTWARE MANUAL - Manual (Page 316)

Glossary G–8
Publication 2706-817
P –
Parameter – A characteristic of a device or system that is defined
as part of its set-up. For instance, a MessageView terminal’s Remote
I/O port must be set up as part of the Application so it can
communicate with the specific type of Logic Controller the system
will use.
Paste – To copy the contents of the clipboard to a specified location.
To paste attributes or variables of a message, see the procedure in the
manual.
Placeholder– Each type of variable has its own placeholder, which
represents it in the Edit Box and Terminal View.
PLC – Acronym for Programmable Logic Controller, an
Allen-Bradley trademarked device.
Pointer – The arrow-shaped cursor on the computer screen that
follows the movement of the mouse and indicates which area of the
screen will be affected when you press the mouse button. The pointer
changes shape during certain tasks. Also called mouse pointer.
Port – The part of a device through which it communicates with
other devices. Before two devices can communicate, they must have
a hardware connector (cable) joining their ports and both ports must
have the correct software communication Parameters set. A
MessageView terminal has an RS-232 port and may also have a
Remote I/O port.
Preset Value – A value that is loaded into a PLC or SLC controller
data table when an Application starts up in a MessageView
terminal.
Project – A database of Tag definitions and device information
associated with an Application. A project may be assigned to more
than one application.
Q –
Queue – A memory location in the MessageView terminal where a
Value-triggered message may be stored if it cannot be displayed
immediately when it is triggered.