Specifications

A - 7
About Generic Terms and Abbreviations
Unless otherwise stated, this textbook uses the following abbreviations and terms for the explanation of MX
Component.
Generic term/Abbreviation Description
PC CPU module Abbreviation of PC CPU module and IBM PC/AT
R
compatible personal computer.
Ethernet module Generic term of the QJ71E71, QJ71E71-B2 and QJ71E71-100.
MELSEC communication
protocol
(MC protocol)
Name of the communication system for accessing the PLC CPU from external devices
using the communication procedures for Q series serial communication modules or
Ethernet interface modules.
(Described as the MC protocol in this textbook)
Two types of communication systems are available; one using ASCII code data and the
other using binary code data.
QJ71E71 Abbreviation of QJ71E71 type Ethernet interface module.
QJ71E71-B2 Abbreviation of QJ71E71-B2 type Ethernet interface module.
QJ71E71-100 Abbreviation of QJ71E71-100 type Ethernet interface module.
External device
Generic term for personal computers, computers, workstations (WS) and other Ethernet
module, etc. that are connected to Ethernet.
Internet
(Internet)
Huge computer network that connects global networks using the communication protocol
TCP/IP.
The Internet is a decentralized network without a computer which controls the overall
network. Also, it is established by allowing the server computers all over the world to
interconnect and provide services individually.
Intranet
(Intranet)
Intra-corporate network that is constructed by the internet standard technology such as
the communication protocol TCP/IP.
There is a specific advantage such as building an application in collaboration with internet
and the integration of operability.
Personal computer Generic term for IBM PC/AT (or 100% compatible) personal computer.