2 results about "FOUNDATION fieldbus" patented technology

This invention provides a method for receiving and decoding fieldbus data, relating to the field of data processing technology. The invention receives petrochemical fieldbus data in real time, then sequentially determines the preamble, start delimiter, end delimiter, and valid data. The valid data is then Manchester decoded and sent to the microcontroller's UART interface. The data received from the UART is then Manchester encoded and output to the fieldbus MAU interface via the microcontroller's SPI interface. This invention solves the current situation where fieldbus transmitter communication interface development relies on dedicated fieldbus communication controller chips, while being compatible with both Foundation Fieldbus and PROFIBUS PA fieldbuses. The UART-based transparent transmission function simplifies the hardware interface, eliminating the need for complex memory bus interfaces, making microcontroller selection easier for users, reducing the development difficulty of fieldbus transmitters, further reducing costs, and enabling product miniaturization.

The application discloses an access device, and relates to the technical field of communication. The device is used for accessing a FF instrument to a high-order Ethernet system on a field side, and comprises the following: a physical layer TRUNK interface connected to an APL power switch, which is used for supplying power to the access device and accessing the access device to the high-order Ethernet system on the field side; a micro control unit used for realizing conversion and processing of high-order Ethernet protocol data and foundation fieldbus data; an FF interface circuit used for encoding or decoding the foundation fieldbus data; an FF power regulator circuit used for acquiring power of the APL power switch through the physical layer TRUNK interface, modulating the power into power meeting a foundation fieldbus standard, and supplying power to an FF network segment protection circuit; and the FF network segment protection circuit used for being connected to the FF instrument. The application realizes access of the FF instrument to the high-order Ethernet system, that is, access to an advanced physical layer of Ethernet, and solves the problem of ecological loss of the advanced physical layer of Ethernet.