WAGO Modular IO System INTERBUS S Servisní příručka stáhnout pdf (Strana 215)

Glossary • 211

WAGO-I/O-SYSTEM 750

ETHERNET TCP/IP

ETHERNET Standard

In 1983 ETHERNET was standardized by IEEE 802.3 10Base-5. ISO took

over the standardization in the ISO Standard 8802/3. The essential

differences between ETHERNET and the IEEE standard are to be found in

the frame architecture and treatment of pad characters.

Fieldbus

System for serial information transmission between devices of automation

technology in the process-related field area.

Firewall

Collective term for solutions which protect LANs connection to the Internet

from unauthorized access. They are also able to control and regulate the

traffic from the LAN into the Internet. The crucial part of firewalls are static

routers which have an access control list used to decide which data packets

can pass from which subscriber.

Frame

Unit of data transferred at the Data-Link layer. It contains the header and

addressing information.

FTP

(File Transfer Protocol) A standard application for TCP/IP which allows

users on one machine to transfer files to/from another.

Function

Module that always returns the same result (as a function value), prerequisite

being identical input values; it has no local variables that store values beyond

an invoke.

Function block

Module that delivers one or more values when being executed. They can be

stored as local variables („Memory“).

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WAGO Modular IO System INTERBUS S Servisní příručka Strana 215