Omron SYSMAC C200H-IDS01-V1, Operation Manual

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Glossary
ASCII code [A(merican) S(tandard) C(ode for) I(nformation) I(nterchange)] A standard
computer code used to facilitate the interchange of information among various
types of data-processing equipment.
Backplane A base to which Units are mounted to form a Rack. Backplanes provide a se-
ries of connectors for these Units along with wiring to connect them to the CPU
and Power Supply. Backplanes also provide connectors used for connection
to other Backplanes. In some Systems, different Backplanes are used for dif-
ferent Racks; in other Systems, Racks differ only by the Units mounted to
them.
backup A copy of existing data which is valuable if the original data is accidentally
erased.
bit The smallest piece of information that can be represented on a computer. A bit
has the value of either zero or one, corresponding to the electrical signals ON
and OFF. A bit is one binary digit.
central processing unit A device that is capable of storing a program and data, and executing the set
of instructions contained in the program. In a PC System, the central process-
ing unit executes the program, processes I/O signals, communicates with ex-
ternal devices, etc.
center displacement In this manual, center displacement refers to the degree of misalignment of the
center points of the Data Carrier and the Read/Write Head (or Antenna) at
which data communication is still possible.
CPU An acronym for central processing unit.
CPU Backplane A Backplane used to create a CPU Rack.
CPU Rack Part of a Rack PC, the CPU Rack contains the CPU, a Power Supply, and oth-
er Units.
Expansion I/O Unit An I/O Unit for a Package-type PC that provides more I/O points to the PC.
flag A bit that is turned ON and OFF automatically by the system in order to provide
status information.
hexadecimal A number system used to represent numbers in base 16 with digits
0,1,2...9,A,B...F.
Intelligent I/O Unit A Unit, such as an ASCII Unit or Ladder Program I/O Unit, that is equipped with
its own CPU and can be programmed.
I/O devices The devices which are connected to the terminals on I/O Units, Special I/O
Units, or Intelligent I/O Units. I/O devices may be part of the Control System if
they function to help control other devices, or they may be part of the controlled
system if they interact directly with it.
I/O Unit The most basic type of Unit mounted to a Backplane. I/O Units include Input
Units and Output Units, each of which is available in a range of specifications.
I/O Units do not include Special I/O Units, Link Units, etc.
PC An acronym for Programmable Controller.