Support For Modbus/udp

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Another variant of MODBUS used in the various industries I work in is MODBUS/UDP instead of MODBUS/TCP.  Although not part of the MODBUS Application Protocol Specification V1.1b, I see many MODBUS/TCP slave devices support MODBUS/UDP.


It's basically a PDU frame shoved into a UDP packet.  The slave uses a UDP port other than the TCP port of 502.


We use MODBUS/UDP for high speed transfers due to it's low overhead compared to TCP.


Something to think about I guess.



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