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Modbus

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Modbus
A high-level protocol for industrial networks developed in 1979 by Modicon (now Schneider Automation Inc.). Providing services at layer 7 of the OSI model, it defines a request/response message structure for a client/server environment. Modbus runs over various data links including its own Modbus+ token passing network and serial links such as RS-232 and RS-485.

It is widely used with TCP/IP over Ethernet. Individual device networks connected to Modbus+ or serial links hook into Ethernet via gateways for transport over an IP network or the Internet. Modbus is governed by the Modbus-IDA Organization, a merger of the Modbus Organization and IDA Group in 2003. For more information, visit www.modbus.org.


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The drive also includes an embedded Modbus serial link that can be also configured as a high speed drive-to-drive link for master/follower functionality.
Better still, by means of PROFIBUS or MODBUS systems, the Memograph M can be expanded to up to 40 channels and connected to SCADA and PLC systems for maximum functionality.
ModBus protocol is widely used in industrial monitoring and test, which is an application layer messaging protocol, positioned at level 7 of the OSI model, that provides client/server communication between devices connected on different types of buses or networks [6].
 
 
 
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