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MODBUS is a trademark of SCHNEIDER ELECTRIC USA, INC.. Filed in October 5 (1981), the MODBUS covers Industrial Communications Systems Comprised of Programmable Controller Interface Units, Protocol Software and Modems.
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In former terminology, the client was named master and the server named slave. Modbus defines a protocol data unit (PDU) independently to its lower layer protocols in its protocol stack. Mapping MODBUS protocol on specific buses or networks requires some additional fields, defined as the application data unit (ADU).
The Modbus RTU (Remote Terminal Unit) protocol is a widely used serial communication protocol in industrial automation and control systems. Operating over serial interfaces like RS-232, RS-422, or most commonly RS-485, Modbus RTU uses a binary format for data representation, which ensures efficient and compact messaging.
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4 sty 2019 · While it’s an open protocol and anybody can use it, “Modbus” is a registered trademark of Schneider Electric USA, Inc. (current owner of the Modicon brand). The Modbus.org organization was created to further the use of Modbus and Schneider Electric has been a partner in it.
