Microscan MS-4X User Manual page 372

Glossary of Terms
Output — A channel or communications line. Data or discrete signals that are transmitted
or displayed by a device.
Parity — An error detection routine in which one data bit in each character is set to 1 or 0
so that the total number of 1 bits in the data field is even or odd.
Picket Fence Orientation — A linear symbol orientation in which the bars are perpendicular
to the symbol's direction of travel.
Pitch — Rotation of a linear or 2D symbol around an axis parallel to the symbol length on
the Substrate. See the illustration below.
Skew axis
Scan line
Pixel — An individual element in a digitized image array; "picture element".
PLC — See Programmable Logic Controller.
Port — Logical circuit for data entry and exit. (One or more ports may be included within a
single connector.)
Processing Time — The time used by a vision system to receive, analyze and interpret
image information. Often expressed in "parts per minute".
Programmable Logic Controller (PLC) — An electronic device used in industrial automation
environments such as factory assembly lines and automotive manufacturing facilities.
Progressive Scan — A non-interlaced scan that doubles the number of visible picture
lines per field by displaying all picture lines at once.
Protocol — The rules for communication between devices, providing a means to control
the orderly flow of information between linked devices.
RAM — See Random Access Memory.
Random Access Memory (RAM) — A data storage system used in computers, composed
of integrated circuits that allow access to stored data in any sequence without movement
of physical parts.
Read Cycle — A programmed period of time or condition during which a reader will accept
symbol input.
Read-Only Memory (ROM) — A data storage medium used in computers and other
electronics, primarily used to distribute Firmware.
Real-Time Processing — In machine vision, the ability of a system to perform a complete
analysis and take action on one part before the next one arrives for inspection.
A-38
Tilt
axis
Pitch
axis
MS-4X Imager User's Manual