Research and implementation of building distributed control system based on S7-200 PLC and PC

机译：基于S7-200 PLC和PC的楼宇分布式控制系统的研究与实现

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In order to solve the problem of data transmission slow and poor real-time control in the distributed system composed of PC extended card CP 5611 and multiple plc s7-200, their communication patterns and RS-485 protocol standards are analyzed. PC and multiple PLC build distributed application system through serial port to convert RS232 to RS485. Slave PLC based on free-port mode, custom command word and data packet format receive commands and data from PC to realize fast data communication. The practical application has proved that this distributed application system is feasible, real-time control is excellent and data transmission is also reliable.

机译：为了解决由PC扩展卡CP 5611和多个plc s7-200组成的分布式系统中数据传输速度慢和实时控制差的问题，分析了它们的通信模式和RS-485协议标准。 PC和多个PLC通过串口建立分布式应用系统，将RS232转换为RS485。基于自由端口模式的从站PLC，自定义命令字和数据包格式从PC接收命令和数据，以实现快速的数据通信。实际应用证明，该分布式应用系统是可行的，实时控制性能优良，数据传输也可靠。

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《Computer and Automation Engineering (ICCAE 2010), 2010》|2010年|p.297-300|共4页
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Mei Dacheng; He Zhimin; Gong Jie; Gu YiFei;
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中图分类计算技术、计算机技术;
关键词
distributed control system; free port; interrupt; programmable controller;

机译：分布式控制系统;自由端口;中断;可编程控制器;

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Research and implementation of building distributed control system based on S7-200 PLC and PC

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