Methods and apparatus to identify a communication protocol being used in a process control system

摘要

Methods and apparatus to identify a communication protocol being used in a process control system are disclosed. An example method includes determining a message structure of a process control message received via a port, determining that the message structure corresponds to a first one of a plurality of process control message protocols, and processing the process control message according to the first process control message protocol.

主权项

1. A method, comprising:
detecting, with a logic circuit of a process control device having a first port connected to a first bus and a second port connected to a second bus, a first signal on the first port, the first port corresponding to a first modulation scheme and the second port corresponding to a second modulation scheme; determining, with the logic circuit, that the first signal received via the first port of the process control device is a first process control message that has a first message structure corresponding to a first process control message protocol of a plurality of process control message protocols; processing the first process control message according to the first process control message protocol; after processing the first process control message, determining, with the logic circuit, that a second process control message received via the second port does not conform to the first process control message protocol; in response to the determining that the second process control message does not conform to the first process control message protocol, determining, with the logic circuit, that the second process control message has a second message structure corresponding to a second process control message protocol different than the first process control message protocol; and processing the second process control message according to the second process control message protocol.