摘要
介绍了针对奥贝尔工艺的污水处理过程自控系统的设计与实施方案,整个系统由上位计算机、下位PLC和远程I/O子站构成三级分布式集散控制系统。较详细地介绍了奥贝尔工艺流程及三级分布式集散控制系统的组成,并解决了实施中的具体问题,如上位计算机与下位PLC通信,用VB编制了实现DDE链结的应用程序;远程I/O子站通过Genius总线与PLC的联接;为使系统可靠运行,主机采用了双机热备方式。系统在某6万t污水处理厂具体实施,结果表明:该设计结构合理,安全可靠,控制精度等技术性能均满足生产的实际需要。
The design and application of the automatic control system for the ORBAL technics water treatment is introduced. This system includes upside computers, downside PLCs and remote I/O workstations. The technics flow, the compose of the 3-class DCS are introduced in details. Specially, the communication between upside computers and downside PLCs,VB programme for DDE link, the connection of remote I/O workstations and PLCs through genius bus, the hot backup redundancy are implemented. Practical results show that the design structure is good, the running is reliable and the requirement is satisfied.
出处
《控制工程》
CSCD
2004年第1期79-81,共3页
Control Engineering of China
