Field bus controller and method

Abstract

The invention provides a field bus controller and method. The controller comprises two Ethernet interfaces DM9000A, a logic controller XC9536, a 16-bit bus transceiver ALVC16245, a double-interface RAM, an X5045EEPROM memory, an RM9200 processor, a 32M flash memory, a 128M SDRAM memory, a CAN bus DC/ DC power isolator, an optical coupled isolator A, an optical coupled isolator B, a half-duplex differential transceiver, two CAN controllers SJA1000T, a CAN transceiver 82C250, a 5V system power supply, a 485 communication DC/ DC power isolator, a board-level serial bus and a double-interface RAM bus interface, wherein the two Ethernet interfaces DM9000A are interconnected. The invention further provides a control method. The field bus controller is easily produced and operated, rich in control functional blocks, simple to achieve a system, and high in reliability.

Description

technical field [0001] The invention relates to the technical field of power plant field bus control, in particular to a field bus controller and a method. Background technique [0002] Fieldbus Control System (FCS for short) is a real-time control communication network that interconnects the lowest level of automation field controllers and field intelligent instrumentation equipment. It follows the ISO OSI open system interconnection reference model for all or part of the communication Protocol, which can realize two-way serial multi-node digital communication. FCS is a fully decentralized, fully digital, fully open and interoperable new-generation production process automatic control device. It is a real-time network control system that interconnects the lowest level of automation field controllers and field intelligent instrumentation equipment. FCS is composed of multi-segment fieldbus, various intelligent field instruments (including flow, pressure, temperature, actuat...

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Problems solved by technology

[0005] (1) The purchase cost of foreign fieldbus controllers is high, and the technology is closed. It is difficult for ordinary thermal engineers and technicians in power plants to deal with daily engineering and technical problems.

[0006] (2) The field bus controller is monopolized by foreign system suppliers, and the use of foreign field bus control systems will generate huge additional service, training and technical support costs, resulting in unnecessary expenses for the power plant in the later stage

[0007] (3) At present, each technology of the field bus controller has its own system, and there are few standard interfaces provided to the outside, or the external interfaces are not disclosed, which is very difficult for the expansion of the system

[0008] (4) The online modification and downloading of existing co

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