Microscan N2210WZ Owner's Manual page 387

Half Duplex — A communication system in which signals can travel between devices in
both directions, but not simultaneously.
Host — A computer, PLC, or other device that is used to execute commands and process
data and discrete signals.
Initialize — Implement serial configuration commands into the scanner's active memory.
Input — A channel or communication line. Decoded data or a discrete signal that is
received by a device.
Ladder Orientation — A linear symbol orientation in which the bars are parallel to the
symbol's direction of travel.
LED — See Light-Emitting Diode.
Light-Emitting Diode (LED) — A semiconductor device that emits light when conducting
current.
Multidrop — A communication protocol for networking two or more scanners or other
devices with a concentrator (or controller) and characterized by the use of individual
device addresses and the RS-485 standard.
Noise — The same as static in a phone line or "snow" in a television picture, noise is any
unwanted electrical signal that interferes with the symbol data being decoded and transmitted
by the scanner.
Normally Closed — A discrete output state that is only active when open.
Normally Open — A discrete output state that is only active when closed.
Output — A channel or communication 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 symbol around an axis parallel to the symbol length on the substrate.
See the illustration below.
axis
Bar code
label
Symbol
Scanner
Scanner
PLC — See Programmable Logic Controller.
Port — Logical circuit for data entry and exit. (One or more ports may be included within a
single connector.)
QX-870 Industrial Raster Scanner User's Manual
Skew
Tilt
axis
Tilt
Pitch
Pitch
axis
Scan line
Appendices
A-101