H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 12/46 (2006.01) H04L 29/06 (2006.01)
Patent
CA 2044005
An interface circuit couples a host processor in an industrial control system to a local area communications network. It includes a protocol machine for receiving and transmitting messages on the network and an interface controller which is programmed to implement one or more protocols. As a message is received by the protocol machine, the interface controller anticipates a responsive message which it writes to the protocol machine even as the message is being received. If the message is received accurately, the responsive message is transmitted without delay.
Engdahl Jonathan R.
Klein Michael T.
Lucak Mark A.
Allen-Bradley Company Inc.
Shapiro Cohen
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