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Modbus Ethernet vs. Modbus TCP

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leemark

I'm trying to figure out what the difference is between Modbus Ethernet and Modbus TCP. Any comments and/or links would be helpful.
 
M

Mark

Modbus Ethernet generally refers to a Modbus RTU or ASCII ADU packet embedded in an Ethernet packet. Port is not defined.

Modbus/TCP refers to a Modbus RTU PDU packet with a Modbus/TCP header for use over TCP/IP on port 502 (standard).

For a complete lineup of Modbus products for development and testing check out http://www.automatedsolutions.com
 
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