| The intelligent sensor is the result that many kinds of technology combined each other, It is high accuracy, reliability characteristics of good communication with the computer in the process control is a very broad application. The fieldbus is the inevitable result of the diffusion of smart sensors, which brings the openness of the process control system, allowing the system to be a measurement, control, execution and diagnosis of integrated process control network capacity.The intelligence sensor of fieldbus with uniform norms and agreements interface standard is a new application of sensor technology, which makes the traditional structure and instrumentation control systems in hardware, software, functional and structural changes have occurred to profound. This paper introduced how to design a smart flow sensor combining smart sensors with traditional meters.PROFIBUS-DP for sensors and the implementation of high-speed data transmission device level, the first part of it to DIN19245, based on their need to achieve the goal of expanding the communications functions, the transmission rate up to 12Mbit/s DP generally constitute the main points system alone, and the main station, from the cycle of data transmission mode used between stations.PROFIBUS-DP designed for high-speed data transmission equipment level. At this level, the central controller (such as PLC/PC) through high-speed serial line with the decentralization of the equipment (such as I/O, drives, valves, etc.) for communication with the most decentralized data exchange equipment is cyclical. Therefore this paper introduced how to used PROFIBUS-DP to achieve the communication between master station and slave station.PROFIBUS-DP agreement is open communication agreement through simulated signal conversion figures signal to the master station and slave station communications.Papers mainly on the intelligent modular instrumentation development on the... |