Programmable logic controller provided with communication functions in a client-server architecture
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United States of America Patent
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Apr 13, 2004
Grant Date -
Aug 16, 2001
app pub date -
Jan 25, 2001
filing date -
Jan 26, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A programmable logic controller system including a private operating system that does not support a TCP/IP protocol, and a communication module connected to a private communication bus and a TCP/IP network, and at least one intelligent module. The communication module includes TCP/IP connection and communication functions, a plurality of delegation services, and a transcoding and routing service configured to encode, decode, and route a request. The private communication bus includes a plurality of supported protocols. Further, the at least one intelligent module includes an HTTP server and at least one application having an application programming interface. The application programming interface is configured to use the TCP/IP connection and communication functions from a remote location. In addition, the plurality of delegation services are configured to enable the at least one application in the at least one intelligent module to delegate services to the communication module on the TCP/IP network.
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