| 引用本文: | 魏 霞,刘 波,陈 科,刘 冉.基于西门子S7 - 200 PLC的CDT远动规约的实现[J].电力自动化设备,2012,32(6): |
| WEI Xia,LIU Bo,CHEN Ke,LIU Ran.Implementation of CDT protocol with S7-200 PLC[J].Electric Power Automation Equipment,2012,32(6): |
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| 摘要: |
| 提出了在S7 - 200等小型可编程序逻辑控制器上实现CDT远动规约的设计方法。CDT协议栈程序主要由通信初始化、CRC校验和数据组帧、发送等部分组成。通过控制遥测帧及遥信帧的发送频次来满足CDT规约的“不同类型的数据帧采用不同优先级”的功能要求。实践证明该实现方法具有运行稳定、可靠及故障自诊断、自恢复的特点。 |
| 关键词: 可编程序逻辑控制器 S7 － 200 CDT 自由口 通信 SCADA系统 |
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| Implementation of CDT protocol with S7-200 PLC |
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WEI Xia1, LIU Bo2, CHEN Ke3, LIU Ran3
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1.College of Electncian Engineering，Xinjiang University，Urumchi ８３００４７，China;2.Urumchi Thermal Power Plant of Huadian Xinjiang Power Co.，Ltd.，Urumchi 830065，China;3.Xinjiang Electric Power Company Dispatch Control Center，Urumchi 830002，China
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| Abstract: |
| The implementation of CDT protocol with programmable logic controller，e.g. S7-200，is proposed. The CDT protocol stack program is mainly composed of following subroutines：communication initialization， CRC，data framing and sending. The sending frequencies of tele-metering frame and tele-signaling frame are controlled to meet the functional requirement of “different types of frame should apply different priorities”. Practice verifies the features of the proposed approach：reliable and stable operation，fault self-diagnosis and self-recovery. |
| Key words: programmable logic controllers S7-200 CDT free port communication SCADA systems |
