Omron SYSMAC C200H-IDS01-V1 Operation Manual page 105

Power Supply
Programmable Controller
register/registered
Remote I/O Slave Rack
Remote I/O Slave Unit
Remote I/O Unit
RS-485 interface
scan time
Special I/O Unit
system configuration
Unit
word
work bits
write protection
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Glossary
A Unit that mounts to a Backplane in a Rack PC. It provides power at the volt-
age required by the other Units on the Rack.
A small, computerlike device that can control peripheral equipment, such as an
electric door or quality control devices, based on programming and peripheral
input devices. Any process that can be controlled using electrical signals can
be controlled by a PC. PCs can be used independently or networked together
into a system to control more complex operations.
Storing text and graphics in the RAM/ROM card from a personal computer or
the ASCII Unit. Graphics that have been written to the RAM/ROM card are re-
ferred to as registered messages.
A Backplane to which is mounted a Remote I/O Slave Unit. This Rack can be
located a considerable distance from the CPU Rack, with the only connection
being a cable connecting the Slave to a Remote I/O Master Unit mounted on
the CPU Rack or on an Expansion I/O Rack.
A Remote I/O Unit that is accessed through a Remote I/O Master Unit.
A Unit that extends the distance an Expansion I/O Rack can be from the CPU.
An industry standard connector for serial communications.
The time the PC requires to perform internal operations such as resetting the
watchdog timer, reading the program, receiving input data, sending output da-
ta, and executing instructions. Scan time is monitored by the watchdog timer
within the PC. If scan time takes longer than specified, an error message may
be generated, or the CPU may stop. Scan times differ according to the config-
uration of the system.
A dedicated Unit that is designed for a specific purpose. Special I/O Units in-
clude Position Control Units, High-speed Counters, Analog I/O Units, etc.
The arrangement in which Units in a System are connected. This term refers
to the arrangement and wiring of all the devices needed to compose the Sys-
tem. In OMRON terminology, "system configuration" describes the arrange-
ment and connection of the Units comprising a Control System that includes
one or more PCs.
In OMRON PC terminology, the word Unit is capitalized to indicate any product
sold for a PC System. Though most of the names of these products include the
word Unit, this is not always so; for example, a Remote Terminal is referred to
as a Unit. Context generally makes the meaning of this word clear.
In digital circuits, a group of bits. Usually a word consists of four, eight, or six-
teen bits. In C-series PCs, a word consists of sixteen bits. Words can be used
to store data, or they can be used for I/O.
Bits in the IR area that are not being used for input or output. These bits can
be used in the program in any way desired.
Write protection is a means of ensuring that specified information written to the
Data Carrier cannot be altered or erased.