Microscan MS-890, Руководство пользователя

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MS-890 Industrial Automation Scanner User Manual
A-39
Appendices
Appendix O — Glossary of Terms
Active Closed — An optoisolated input-output that’s logically “on” when current flows
through the connection points.
Active Open — An optoisolated input-output that’s logically “on” when no current flows
through the connection points.
Analog Gain Adjustment (AGC) — Adjustment to signal strength that seeks to maintain
a constant level regardless of the range of the symbol.
Application Record — A variation of EAN-128 which adds an application identifier to
symbol data, including user-definable separators, brackets, and padding.
Autocalibration — A routine that cycles through various optical settings and selects the
combination that produce the best read rate.
Autodiscrimination — The ability to decode several different symbologies without
changing configuration.
Auto Range — Outward focus of the scanner until an object is sensed by signal strength.
The scanner then begins searching for a decodable symbol.
Auxiliary Port — Auxiliary terminal connection for remote viewing and command inputs.
Bar Code — A symbol in which data has been encoded in an array of parallel bars and
spaces of varying widths.
Baud Rate — The number of discrete signal events per second. Bits per second.
Channel — A high-speed pathway between the computer and the control units of the
peripheral devices.
Check Digit — A Modulus 43 or Modulus 10 digit that is added to the symbol data for
additional data integrity.
Command Processing — Allows the user to enter ESP from the Aux Port or send serial
string commands from the Aux Port.
Configuration — A setup or process of changing a scanner’s settings to conform to a
specific application.
Concentrator — Intermediary device that relays data from scanners to a host and commands
from the host to the scanner or other devices.
Connector — Physical device (plug or socket) on a device or cable to provide in/out connectivity
for various circuits and pins.
Counter — Memory space provided to keep track of scanner events.
Daisy Chain — Linkage of scanners to allow data to be relayed up to the host via Aux
Port connections.
Decode — A Good Read. The successful scanning and decoding of the information
encoded in a symbol.
Default — Restores ROM settings and resets the scanner.
Delimited — A command or field that is bracketed by pre-defined characters.
Decode Rate — The number of good reads per second decoded by the scanner.