A-12
MS-5000 Multidrop Concentrator User’s Manual
Appe
ndices
Menu Configuration.
The process of changing factory default settings via
a sequence of menus displayed on a terminal monitor.
Monitor
. DTE device which can echo data from the host or decoder, and be
used in configuration.
Multidrop.
A communications protocol for networking two or more decoders
or other devices with a concentrator (or controller) and characterized by the
use of individual device addresses and the RS-485 standard.
Null.
A non-printed character that acts as a space-holder.
Object Detector.
A photo electric device used to sense the presence or
absence of an object.
Operational Commands.
Serial commands from the host to the reader that
control current operating parameters, counters, master label operations, and
program management that are not stored in non-volatile RAM.
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.
Point-to-Point.
A protocol consisting of a single communications event,
typically used to connect a bar code reader to a CRT terminal or a host
computer.
Polled Protocol.
A communication protocol in which the host requests
information from the concentrator by means of an address.
Polling Request
. In a typical multidrop network, a polling request occurs
when the concentrator polls the devices under it by substituting the ASCII
hex values associated with each poll address.
Port.
Logical circuit for data entry and exit. (One or more ports may be
included within a single connector.)
Protocol.
The rules for communication between devices, providing a
means to control the orderly communication of information between linked
devices.
RAM.
Random Access Memory. Memory that is lost after power is recycled
to the unit.
Relay Driver.
A TTL signal sent by the decoder. The output is determined
by the relay driver selection during configuration.
ROM.
Read Only Memory. Memory that cannot be changed.
Scan Head.
The module that projects laser light on bar code labels and
receives reflected light back. This device changes the analog signal to a
digital representation of the bar code and outputs it to a decoder.
Summary of Contents for MS-5000
Page 1: ...MS 5000 Multidrop Concentrator User s Manual P N 83 005000 REV J...
Page 8: ...viii MS 5000 Multidrop Concentrator User s Manual...
Page 52: ...Chapter 3 Menu Configuration 3 18 MS 5000 Multidrop Concentrator User s Manual 3 Serial Config...
Page 66: ...Chapter 4 Serial Commands 4 14 MS 5000 Multidrop Concentrator User s Manual 4 Operations...
Page 90: ...A 14 MS 5000 Multidrop Concentrator User s Manual Appendices...
