Rockwell Automation 5370 CVIM Communications Manual - Manual (Page 196)

Bulletin 5370 CVIM
Glossary
Configurable Vision Input Module
G–1
A
ACK
An abbreviated term for Positive
Acknowledgment. A control code
that indicates that the previous
transmission block was received.
address
A character or group of
characters
that identifies a register, a particular
part of storage, or some other data
source or destination. To refer to a
device or an item of data by its
address.
ASCII
The character set and code described
in American National Standard Code
for Information Interchange, ANSI
X3.4–1977. Each ASCII character is
encoded with 8–bits including parity
check.
B
backplane
A printed circuit card located in the
back of a rack, which has sockets
into which specific boards fit for
interconnection.
BASIC
Acronym for Beginner’s
All–Purpose Symbolic Instruction
Code. A problem solving,
algebra–like programming language.
block
A group of words considered as a
unit.
bit
An acronym for Binary Digit. The
smallest unit of information in the
binary numbering system.
Represented by the digits 0 and 1.
byte
A unit of data that contains 8 bits
C
centroid
Midpoint
of x and y axis of an
object.
CVIM
Allen-Bradley trademark for
Configurable Vision Input Module.
Pronounced as “See VIM”.
D
data link
The communication(s) lines, related
controls, and interface(s) for the
transmission of data between two or
more devices.
F
fixed point
A number system in which the
position of the decimal point is fixed
in respect to one end of a string of
numbers.
flag
An indicator. A single bit of a
memory location, used to detect and
remember the occurrence of some
event.
floating point
A system of representing numerical
quantities with a variable number of
places in which the location of the
point does not remain fixed.
G
gray scale
In monochromatic displays,
variations in brightness level used to
enhance the contrast among the
displayed features.