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智能变送器、智能电磁阀等数字现场总线器件使分散控制系统的性能大幅度的提高和改进如增加可靠性,提高控制精度,减少安装和维护费用,提供多种诊断信息,使系统简化等。总而言之,数字现场总线通讯网络将导致分散控制系统革命性的变化。智能传感器在80年代初将微处理器引入变送器,使现场器件具有一定的控制能力,微处理器能否在恶劣的现场工业环境中可靠运行,是首先要克服的障碍,但时至今天,这个问题已解决,智能变送器的可靠性已被现场验证,并具有良好的用户友好性,其他促使智能变送器发展的因素为:·比模拟量变送器有更高的精度
Intelligent transmitters, smart solenoid valves and other digital fieldbus devices to greatly improve the performance of decentralized control system and improve, such as increasing reliability, improve control accuracy, reduce installation and maintenance costs, provide a variety of diagnostic information to simplify the system . All in all, the digital fieldbus communication network will result in a revolutionary change in decentralized control systems. Smart sensors introduced the microprocessor into the transmitter in the early 1980s, giving the field devices some control over whether microprocessors could operate reliably in harsh on-site industrial environments and were the first hurdle to overcome, but today , The problem has been solved, the reliability of intelligent transmitter has been field-proven and has good user-friendliness, and other factors that contributed to the development of smart transmitters: · higher accuracy than the analog transmitter