介绍了燃气蒸汽锅炉PLC冗余控制系统的设计,PLC选用西门子产品CPU315-2DP系列,系统监控和生产数据管理软件选用WinCC 7.3。此系统具备冗余功能,兼顾了经济性与可靠性。经过近两年的运行,完全满足用户连续生产的工艺需求。 The design of the PLC redundant control system for gas steam boiler is introduced. The PLC selects Siemens CPU315-2DP series and the system monitoring and production data management software selects WinCC 7.3. This system has the redundancy function, taking into account the economy and reliability. After nearly two years of operation, fully meet the user’s continuous production process needs.