Omron C200H-MC221 -, Operation Manual

Page: 295 / 305

Glossary
275
in position The range within which the system is determined to be at the target position.
input The signal coming from an external device into the PC. The term input is often
used abstractly or collectively to refer to incoming signals.
interpolation
The mathematical calculation of missing values based on known values. The
Motion Control Unit uses interpolation when positioning along two or more axes
simultaneously. There are three types of interpolation possible: linear, circular,
and helical (a combination of linear and circular).
interface An interface is the conceptual boundary between systems or devices and usu-
ally involves changes in the way the communicated data is represented. Inter-
face devices such as NSBs perform operations like changing the coding, format,
or speed of the data.
IR Area A data area whose principal function is to hold the status of inputs coming into
the system and that of outputs that are to be set out of the system. Bits and words
in the IR that are used this way are called I/O bits and I/O words. The remaining
bits in the IR area are work bits.
least-significant (bit/word) See rightmost (bit/word) .
leftmost (bit/word) The highest numbered bits of a group of bits, generally of an entire word, or the
highest numbered words of a group of words. These bits/words are often called
most-significant bits/words.
linear interpolation Dual-axis, linear positioning from the present position to a point designated as
the interpolation end point based on specified points.
load The processes of copying data either from an external device or from a storage
area to an active portion of the system such as a display buffer. Also, an output
device connected to the PC is called a load.
local In network communications, the node or device from which communications are
being viewed. See remote .
LSS Abbreviation for Ladder Support Software.
M code An abbreviation for machine code. The user can set various M codes for various
positions so that each M code will be output when the workpiece passes its
respective position.
MC program A G-language program that controls the MC Unit’s operation.
megabyte A unit of storage equal to one million bytes.
most-significant (bit/word) See leftmost (bit/word).
MS-DOS An operating system in common use on smaller computers.
NC contacts Normally-closed contacts. A pair of contacts on a relay that open when the relay
is energized.
negative software limit The lower limit on the number of pulses set as a software parameter.
nesting Programming one loop within another loop, programming a call to a subroutine
within another subroutine, or programming an IF–ELSE programming section
within another IF–ELSE section.