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Glossary
address
A number used to identify the location of data or programming instructions in
memory or to identify the location of a network or a unit in a network.
advanced instruction
An instruction input with a function code that handles data processing opera-
tions within ladder diagrams, as opposed to a basic instruction, which makes
up the fundamental portion of a ladder diagram.
allocation
The process by which the PLC assigns certain bits or words in memory for var-
ious functions. This includes pairing I/O bits to I/O points on Units.
analog
Something that represents or can process a continuous range of values as op-
posed to values that can be represented in distinct increments. Something that
represents or can process values represented in distinct increments is called
digital.
Analog I/O Unit
I/O Units that convert I/O between analog and digital values. An Analog Input
Unit converts an analog input to a digital value for processing by the PLC. An
Analog Output Unit converts a digital value to an analog output.
AND
A logic operation whereby the result is true if and only if both premises are true.
In ladder-diagram programming the premises are usually ON/OFF states of
bits or the logical combination of such states called execution conditions.
area
See
data area
and
memory area
.
area prefix
A one or two letter prefix used to identify a memory area in the PLC. All mem-
ory areas except the CIO Area require prefixes to identify addresses in them.
ASCII
Short for American Standard Code for Information Interchange. ASCII is used
to code characters for output to printers and other external devices.
asynchronous execution
Execution of programs and servicing operations in which program execution
and servicing are not synchronized with each other.
Auxiliary Area
A PLC data area allocated to flags and control bits.
auxiliary bit
A bit in the Auxiliary Area.
backup
A copy made of existing data to ensure that the data will not be lost even if the
original data is corrupted or erased.
BASIC
A common programming language. BASIC Units are programmed in BASIC.
basic instruction
A fundamental instruction used in a ladder diagram. See
advanced instruction
.
BASIC Unit
A CPU Bus Unit used to run programs in BASIC.
baud rate
The data transmission speed between two devices in a system measured in
bits per second.
BCD
Short for binary-coded decimal.
binary
A number system where all numbers are expressed in base 2, i.e., numbers
are written using only 0’s and 1’s. Each group of four binary bits is equivalent
to one hexadecimal digit. Binary data in memory is thus often expressed in
hexadecimal for convenience.
Summary of Contents for CS1W-SLK11-21 - 06-2004
Page 1: ...Cat No W367 E1 02 SYSMAC CS1W SLK11 21 SYSMAC LINK Units...
Page 2: ...CS1W SLK11 21 SYSMAC LINK Units Operation Manual Revised June 2004...
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Page 170: ...153 Appendix B Dimensions CS1W SLK11 Optical SYSMAC LINK Unit Unit mm...
Page 171: ...154 Dimensions Appendix B CS1W SLK21 Coaxial SYSMAC LINK Unit Unit mm...
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Page 202: ...SYSMAC CS1W SLK11 21 SYSMAC LINK Units Cat No W367 E1 02 OPERATION MANUAL...