SYSTEM AND METHOD FOR ACCESSING INFORMATION USING OBJECTS

摘要

A device, such as a HART multiplexer, may allow devices that communicate using the EtherNet/IP protocol or other protocols that support treating collections of data as objects to access one or more instruments. The devices may communicate with one or more object instances that each correspond to an instrument. These object instances may include data that corresponds to data that may be obtained from the underlying instrument. These object instances may be updated automatically, allowing requests for information in the object instances to be quickly fulfilled.

主权项

1. A method comprising:
updating, at a first device, an instance of an object that corresponds to a Highway Addressable Remote Transducer (HART) instrument that is connected to the first device, wherein updating the instance of the object includes sending one or more HART commands to the HART instrument, receiving data from the HART instrument in response to the one or more HART commands, and saving at least some of the data received from the HART instrument in the instance of the object; receiving, at the first device, a request from a second device to read at least a portion of the instance of the object; and sending, from the first device to the second device, a response to the request, wherein the response contains at least a portion of the data that was received from the HART instrument and saved in the instance of the object.