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Product Description XI/ON - Eaton Automation

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<strong>XI</strong>/<strong>ON</strong>: Gateways for Modbus TCP 10 Glossary<br />

L<br />

M<br />

P<br />

Lightning protection<br />

All measures taken to protect a system from damage due to overvoltages<br />

caused by lightning strike.<br />

Low impedance connection<br />

Connection with a low AC impedance.<br />

LSB<br />

Least Significant bit<br />

Mass<br />

All interconnected inactive components that do not take on a<br />

dangerous touch potential in the case of a fault.<br />

Master<br />

Station in a bus system that controls the communication between<br />

the other stations.<br />

Modbus TCP<br />

The Modbus protocol is part of the TCP/IP protocol.<br />

The communication is realized via function codes, which are implemented<br />

into the data telegram. Modbus TCP uses the Transport<br />

Control Protocol (TCP) for the transmission of the Modbus user<br />

protocol in Ethernet-TCP-IP networks.<br />

Module bus<br />

The module bus is the internal bus in a station. The modules<br />

communicate with the gateway via the module bus which is independent<br />

of the fieldbus.<br />

MSB<br />

Most Significant bit<br />

Ping<br />

Implementation of an echo-protocol, used for testing whether a<br />

particular host is operating properly and is reachable on the network<br />

from the testing host.<br />

218 M001973-01, 07/2007

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