Accu-Sort AXIOM 400, Руководство по эксплуатации продукта

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Glossary
AXIOM™ 400 Product Manual
Accu-Sort Systems, inc. A3-AXIOM400-Glossary_R10.doc
ESC (Escape)
A control character which is used to provide additional control functions.
It alters the meaning of a limited number of continuously following bit
combinations. (^[)
error
A discrepancy between a computed, observed or measured value or
condition and the true, specified or theoretically correct value or
condition.
ETX (End of Text)
A transmission control character that terminates a text.
even parity
A data verification method in which each character must have an even
number of on bits.
far distance
The distance (in inches) from the face of the scanner to the farthest point
at which a code can be successfully scanned.
feet per minute (FPM)
Typically used to define the speed of a conveyor. Conveyor speed may also
be defined in meters per second.
flying lead
A lead that exits the back of the connector hood on the outside of the
cable jacket. It is normally attached to the drain wire or shield and
connected to the chassis of the switch, modem, etc. It can also be a
hardware control lead.
front read
The scanner is mounted to read bar codes on the leading edge of a box as
it passes the scanner. In a front read application, the scanner can be
mounted above or on the side of the conveyor.
front/top read
The camera is mounted to read the front and top of packages as they pass
through the scanning area. In a front/top read application, the camera is
usually mounted above the conveyor positioned at a 45 degree angle to
enable it to scan both the front and top of packages
full duplex (FDX)
Simultaneous, two-way, independent transmission in both directions.
gateway
A device used to connect networks using different protocols so that
information can be passed from one system or network to the other(s).
(See s
ubnet mask .)
gateway address
Like all other devices on a network, the device serving as the Gateway
must also have an IP address so that devices wishing to communicate with
devices outside its own network can fine the Gateway which will forward
its data. Like all other addresses, it is displayed in the “dotted-decimal”
format.
guard bars
1) The bars at the ends and center of a UPC and EAN symbol that ensure a
complete scan of the bar code. 2) The optional bars outside the quiet zone
of an I 2 of 5 symbol that ensure a complete scan of the bar code.
Half Duplex (HDX)
Transmission in either direction, but not simultaneous.
handshaking
Exchange of predetermined signals between two devices establishing a
connection. Usually part of a communications protocol.
hardware trigger
This is an electrical signal from a relay, photoeye, or proximity switch
indicating that an object is passing by the reader.
header
A means of identifying the beginning of a message to be sent to the host.
One example is <STX> or Start of Text.
height of scan
The maximum vertical scanning dimension of a moving beam scanner at a
specific distance from the face of the scanner.
hexadecimal
A base-16 numbering system that uses the symbols
0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F.
host
1) A central controlling computer in a network system. 2) Any device on a
network system that provides a controlling function to another device on
the network. 3) Any intelligent device for which another device is
providing a communication interface to a network.
hot-swappable
The ability to change or replace an Axiom scan head from a wiring base
without the need to disconnect the unit from its power source.
induct photoeyes
The cart cycle begins when the start of cart photoeye is blocked and
continues until the cart photoeye is unblocked. Blocking the INDUCT
photoeye causes relay decisions and data communication. For this
placement the distance between the CART and INDUCT photoeyes must be
less than the minimum box size plus the minimum box spacing.
input/output modules, I/O modules
OPTICALLY ISOLATED INPUT/OUTPUT MODULES. Flexible modules that
allow the reader to control high voltage outputs that are susceptible to
noise. Since they are isolated from each other the noise is not picked up in
the reader.
The modules come in both input and output versions. The output versions
are controlled by a 5VDC input. The output of the modules can range from
24VAC - 140VAC or 3VDC - 200VDC. Foreign voltage ranges are available.
The maximum current that the modules can supply is limited by the output
voltage and the module type. The input versions are controlled by either a
DC or AC input ranging from 3VDC - 32VDC or 90VAC - 140VAC. Foreign
voltage ranges are available. The output of the modules is a 5VDC level.
The maximum current is limited by the input modules. These output
modules are commonly used to control diverters, alarms, external relays,
etc. The input modules can be used for photoeye inputs.
intercharacter gap
The space between two adjacent bar code characters in a discrete code.
interface
A shared boundary defined by common physical interconnection
characteristics, signal characteristics and meanings of interchanged
signals.
interleaved bar code
A bar code in which characters are paired together using bars to represent
the first character and spaces to represent the second.
I/O
The abbreviation for input/output. The keyboard and a printer, are
examples of I/O devices. I/O activity is different from computational
activity. When a program sends a document to the printer, it is engaging
in I/O activity; when the program sorts a list of terms, it is engaging in
computational activity.