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8-13. Terminology
8-13. Terminology
An alphanumeric value that identifies where data is stored.
The temperature of the air surrounding a system.
A standard system used for designating the size of electrical conductors.
Larger gauge numbers have smaller diameter.
A Boolean operation that produces a logic “1” output if all inputs are “1”,
and a logic “0” if any input is “0”.
American Standard Code for Information Interchange. ASCII is normally
used when alphanumeric (letters and decimal numbers) and control codes are
sent as information to printers, etc. ASCII can be represented using 7 or 8
bits and is often expressed in a 2-digit hexadecimal form converted from
specific binary expressions. ASCII expressed in 2-digit hexadecimals is
called “ASCII HEX code”. For details about actual ASCII codes, refer to the
table for ASCII.
[EXAMPLE] When a letter “M” is expressed in ASCII code:
7-bit ASCII :
1001101 (binary)
ASCII HEX code: 4D (hexadecimal)
Not synchronous. Repeated operations that take place in patterns unrelated
over time.
See American Wire Gauge (AWG).
A printed circuit board located in the back of a chassis, that contains a data
bus, power bus, and mating connectors for units. For FP3, FP5, FP10S and
FP10 programmable controllers, two types of backplanes are available:
Master Backplane
Expansion Backplane
A device that is kept available to replace something that may fail during
operation.
A battery or set of batteries that will provide power to the processor memory
only when system power is lost. All FP-Ms and FP1 C24, C40, C56, and C72
series programmable controllers have a battery backup system.
A condition that exists when the backup battery voltage drops low enough to
require battery replacement. For all FP-Ms and FP1 C24, C40, C56, and C72
series, the ERR. LED turns ON.
Formally defined as the shortest pulse width in data communication.
However, usually used to refer to the number of binary bits transmitted per
second (bps) during serial data communication.
See Block Check Code.
See Binary Coded Decimal.
address:
ambient temperature:
American Wire Gauge (AWG):
AND:
ASCII:
asynchronous:
AWG:
backplane:
backup:
battery backup:
battery low:
baud:
BCC:
BCD:
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