Quantum热备系统主备切换扰动问题
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摘要
为了解决Modicon Quantum CHS 110热备系统在主备切换过程中存在的电动调节阀误动作的扰动问题,在站场PLC系统程序中增加了测试逻辑,对出现数值变化的变量进行检测,记录变量瞬间变化的数值及对应时间,结合热备系统工作原理,研究导致设备误动作的直接原因和根本原因。研究表明:Quantum热备系统主备切换时,调节阀误动作的直接原因是相关变量数值发生了初始化,根本原因是PLC系统程序设计时的内存分配不合理,造成热备模块间数据传送时间过长,主备切换过程中数据丢失。因此,解决该问题,应该从PLC系统程序内存分配和程序修改着手。
During active-standby switchover of Modicon Quantum CHS 110 hot standby system, some electric control valves may generate malfunctions. To solve the problem, test logics are added in PLC system programs in stations to detect variants with numerical changes to record their instantaneous values and corresponding time. Combined with the principles of the hot standby system, direct and root causes for malfunctions of relevant units are studied. Research results show that, during active-standby switchover of the Quantum hot standby system, direct cause for malfunction of the control valve is the initialization of relevant variants, whereas the root cause is the prolonged data transmission among hot standby modules and relevant data losses due to improper allocation of memories in programming of the PLC system. To solve these problems, memory allocation and software programming of the PLC system should be modified.
During active-standby switchover of Modicon Quantum CHS 110 hot standby system, some electric control valves may generate malfunctions. To solve the problem, test logics are added in PLC system programs in stations to detect variants with numerical changes to record their instantaneous values and corresponding time. Combined with the principles of the hot standby system, direct and root causes for malfunctions of relevant units are studied. Research results show that, during active-standby switchover of the Quantum hot standby system, direct cause for malfunction of the control valve is the initialization of relevant variants, whereas the root cause is the prolonged data transmission among hot standby modules and relevant data losses due to improper allocation of memories in programming of the PLC system. To solve these problems, memory allocation and software programming of the PLC system should be modified.
引文
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[2]袁亚辉,刘俊峰,郝鹏辉,等.Modicon Quantum PLC热备系统的典型故障及其解决方法[J].热力发电,2013,42(3):106-107.YUAN Y H,LIU J F,HAO P H,et al.The typical faults and solutions of Modicon Quantum PLC hot standby system[J].Thermal Power Generation,2013,42(3):106-107.
[3]许坚.施耐德Unity Pro PLC双机热备技术在自控系统中的应用[J].新疆有色金属,2010,33(3):60-62.XU J.Application of hot standby technology with Schneider Unity Pro PLC in the automatic control system[J].Xinjiang You Se Jin Shu,2010,33(3):60-62.
[4]李付民.Quantum PLC和Concept软件在汽轮风机控制系统中的应用[J].自动化信息,2008(12):59-60,63.LI F M.Application of Quantum PLC and Concept software in the control system of turbine blower[J].Automation Information,2008(12):59-60,63.
[5]王海峰,梁建青,彭太翀,等.西气东输二线分输压力流量控制逻辑优化[J].自动化仪表,2013,34(1):89-91,94.WANG H F,LIANG J Q,PENG T C,et al.Optimization of the control logic for sub-transmission pressure&flow in the Second West-East Natural Gas Pipcline[J].Process Automation Instrumentation,2013,34(1):89-91,94.
[6]郑阿奇.施耐德PLC应用技术[M].北京:电子工业出版社,2011:165-171.ZHENG A Q.The application technology of Schneider PLC[M].Beijing:Publishing House of Electronics Industry,2011:165-171.
[7]王海峰.西气东输一线分输压力PID控制效果改进[J].化工自动化及仪表,2015,42(4):451-454.WANG H F.Optimization of the PID control effect for subtransmission pressure in the First West-East Natural Gas Pipeline[J].Control and Instruments in Chemical Industry,2015,42(4):451-454.
[8]李友根,贺田春,黄艳红.浅谈发电厂ROTORK电动门接线原理及调试[J].电源技术应用,2013(1):243-248.LI Y G,HE T C,HUANG Y H.Discussion on the wiring and debugging of the ROTORK electrically operated valve in the power plant[J].Power Supply Technologies and Applications,2013(1):243-248.
[9]吴宗楠,周超,潘伟林.施耐德PLC热备系统投运问题分析与解决方法[J].自动化应用,2014(9):35-37.WU Z N,ZHOU C,PAN W L.Analysis and solution of operation problem of Schneider PLC standby system[J].Automation Application,2014(9):35-37.
[10]池长恒,许玲玲.Quantum PLC双机热备在火车采样中的设计及应用[J].科技与企业,2012(6):135.CHI C H,XU L L.The design and application of hot standby with Quantum PLC in the train sampling[J].ScienceTechnology Enterprise,2012(6):135.