MODBUS/TCP Fieldbus manual - Koco Motion GmbH
MODBUS/TCP Fieldbus manual - Koco Motion GmbH
MODBUS/TCP Fieldbus manual - Koco Motion GmbH
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Revision R020111<br />
<strong>MODBUS</strong>/<strong>TCP</strong> <strong>Fieldbus</strong> <strong>manual</strong> 3 <strong>MODBUS</strong>/<strong>TCP</strong><br />
3 <strong>MODBUS</strong> Implementation<br />
3.1 <strong>MODBUS</strong> overview<br />
<strong>MODBUS</strong> is a communications interface developed in 1979 by PLC<br />
manufacturer Modicon, Inc. (now a brand of Schneider Electric).<br />
<strong>MODBUS</strong> is designed for multidrop networks based on a master-client<br />
architecture.<br />
The availability of devices using <strong>MODBUS</strong> has made it a de facto<br />
standard for industrial communications network. <strong>MODBUS</strong> was originally<br />
developed for use with serial communications interfaces such as<br />
RS-232 and RS-485, <strong>MODBUS</strong>/<strong>TCP</strong> communications over <strong>TCP</strong>/IP has<br />
become a standard because of the ease of interface and simpler message<br />
format.<br />
Controller<br />
Ethernet switch<br />
MDrive #1<br />
e.g. 192.168.33.1<br />
PC<br />
Figure 3.1: Example <strong>MODBUS</strong> network with MDrive products.<br />
Additional Ethernet devices<br />
MDrive #2<br />
e.g. 192.168.33.2<br />
3-1
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