| 摘要 |
<p>What is disclosed is a gateway, and associated control system and method, for communication between a main control device connected to a local area network and a plurality of slave devices connected to a local serial bus in an industrial automation control network. The gateway comprises a first interface for communication with the main control device over the local area network; a second interface for communication with a plurality of slave devices over the local serial bus and an I/O scanner processor. The I/O scanner processor is configured to poll an I/O state of each of the plurality of slave devices over the second interface, to process the I/O state information received from polling each slave device and determine whether to transmit information to the main control device based on the I/O state information, and to occasionally transmit it such information to the main control device over the first interface based on such determination, thereby offloading the slave device I/O scan processing from the main control device to the gateway.
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