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Chapter 1 Introduction<br />
1.3 Terminology<br />
Here describes the terminology used in this user’s manual.<br />
Terminology Definition Remarks<br />
Module<br />
Unit<br />
PLC System<br />
XG 5000<br />
I/O image area<br />
Rnet<br />
A device like I/O board assembled to insert in a motherboard or<br />
base as a standardized factor having the regular function to<br />
configure the system.<br />
A module or module aggregate which is the minimum unit in<br />
operation of PLC system. It configures the PLC system by<br />
connecting to other module or module aggregate.<br />
A system consisted of PLC and peripherals and which is<br />
configured to enable the control by user program<br />
Graphic loader to carry out program writing, editing and debug<br />
function<br />
Internal memory area of CPU module installed to maintain the<br />
input and output state<br />
Remote Network (Remote dedicated network)<br />
Ex)<br />
CPU module,<br />
power module,<br />
I/O module etc.<br />
Ex)<br />
Basic unit,<br />
Extended unit<br />
Fnet<br />
RAPIEnet<br />
Cnet<br />
FEnet<br />
Pnet<br />
Dnet<br />
RTC<br />
Watch<strong>do</strong>g Timer<br />
Task<br />
Field bus Network<br />
Real-time Automation Protocols for Industrial Ethernet<br />
Computer Network<br />
Fast Ethernet Network<br />
Profibus-DP Network<br />
DeviceNet Network<br />
Real Time Clock. A general name of universal IC having the<br />
clock function<br />
A timer to monitor the assigned running time of program and give<br />
an alarm if failed to complete the processing within the assigned<br />
time.<br />
There are three kind of tasks. (cycle time task, internal device<br />
task, external device task by external interrupt module’s input<br />
signal)<br />
1-4
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