Chapter 1. Introduction
1-5
1.3 Terminology
The following table gives definition of terms used in this manual.
Terms Definition Remark
Module
A standard element that has a specified function which configures
the system. Devices such as I/O board, which inserted onto the
mother board.
Expansion module,
Special module,
Communication
Unit
A single module or group of modules that perform an
independent operation as a part of PLC systems.
Main unit,
Expansion unit
PLC System
A system which consists of the PLC and peripheral devices.
A user program can control the system.
-
XG5000
A program and debugging tool for the MASTER-K series.
It executes program creation, edit, compile and debugging.
(PADT: Programming Added Debugging Tool)
-
I/O image area
Internal memory area of the CPU module which used to hold I/O
status.
Cnet Computer Network -
FEnet Fast Ethernet Network -
RAPIEnet RAPIEnet Network
CANopen Controller Area Network
Pnet Profibus-DP Network -
Dnet DeviceNet Network -
RTC
Abbreviation of ‘Real Time Clock’. It is used to call general IC that
contains clock function.
-
Watchdog Timer
Supervisors the pre-set execution times of programs and warns if
a program is not competed within the pre-set time.
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