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URL:
http:// URL: http://www.modicon.com/opennetworking/modbus/
MODBUS PLUS is a protocol using a Token Ring network
topology with a physical access based on a transmission speed to 1 Mb/s. The
ModBus Plus protocol uses MODBUS messaging for the application layer, and the
HDLC protocol for the network layer.
Keywords:
Modbus Plus, peer to peer, token exchange, high speed,
EIA/TIA/RS-485, multi-master, point to point, self-healing
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