Omron SYSMAC CV Series Operation Manual page 618

programmed alarm
programmed error
programmed message
Programming Console
Programming Device
PROM
PROM Writer
prompt
protocol
PV
Rack
rack number
Rack PC
RAM
612
Glossary
grammable Controllers are used to automate control of external devices. Al-
though single-unit Programmable Controllers are available, building-block Pro-
grammable Controllers are constructed from separate components. Such Pro-
grammable Controllers are formed only when enough of these separate compo-
nents are assembled to form a functional assembly, i.e., there is no one individu-
al Unit called a PC.
An alarm given as a result of execution of an instruction designed to generate the
alarm in the program, as opposed to one generated by the system.
An error arising as a result of the execution of an instruction designed to gener-
ate the error in the program, as opposed to one generated by the system.
A message generated as a result of execution of an instruction designed to gen-
erate the message in the program, as opposed to one generated by the system.
The simplest form or programming device available for a PC. Programming
Consoles are available both as hand-held models and as CPU-mounting mod-
els.
A Peripheral Device used to input a program into a PC or to alter or monitor a
program already held in the PC. There are dedicated programming devices,
such as Programming Consoles, and there are non-dedicated devices, such as
a host computer.
Programmable read-only memory; a type of ROM into which the program or
data may be written after manufacture, by a customer, but which is fixed from
that time on.
A peripheral device used to write programs and other data into a ROM for per-
manent storage and application.
A message or symbol that appears on a display to request input from the opera-
tor.
The parameters and procedures that are standardized to enable two devices to
communicate or to enable a programmer or operator to communicate with a de-
vice.
See present value .
An assembly that forms a functional unit in a Rack PC System. A Rack consists
of a Backplane and the Units mounted to it. These Units include the Power Sup-
ply, CPU, and I/O Units. Racks include CPU Racks, Expansion I/O Racks, and
I/O Racks. The CPU Rack is the Rack with the CPU mounted to it. An Expansion
I/O Rack is an additional Rack that holds extra I/O Units. An I/O Rack is used in
the C2000H Duplex System, because there is no room for any I/O Units on the
CPU Rack in this System.
A number assigned to a Rack according to the order that it is connected to the
CPU Rack, with the CPU Rack generally being rack number 0.
A PC that is composed of Units mounted to one or more Racks. This configura-
tion is the most flexible, and most large PCs are Rack PCs. A Rack PC is the
opposite of a Package-type PC, which has all of the basic I/O, storage, and con-
trol functions built into a single package.
Random access memory; a data storage media. RAM will not retain data when
power is disconnected.