This paper proposes to adopt SCADA and PLC technology for the improvement of the performance of real time signaling&train control systems in metro railways.The main concern of this paper is to minimize the failure...This paper proposes to adopt SCADA and PLC technology for the improvement of the performance of real time signaling&train control systems in metro railways.The main concern of this paper is to minimize the failure in automated metro railways system operator and integrate the information coming from Operational Control Centre(OCC),traction SCADA system,traction power control,and power supply system.This work presents a simulated prototype of an automated metro train system operator that uses PLC and SCADA for the real time monitoring and control of the metro railway systems.Here,SCADA is used for the visualization of an automated process operation and then the whole opera-tion is regulated with the help of PLC.The PLC used in this process is OMRON(NX1P2-9024DT1)and OMRON’s Sysmac studio programming software is used for developing the ladder logic of PLC.The metro railways system has deployed infrastructure based on SCADA from the power supply system,and each station’s traction power control is connected to the OCC remotely which commands all of the stations and has the highest command priority.An alarm is triggered in the event of an emergency or system congestion.This proposed system overcomes the drawbacks of the current centralized automatic train control(CATC)system.This system provides prominent benefits like augmenting services which may enhance a network’s full load capacity and networkflexibility,which help in easy modification in the existing program at any time.展开更多
According to the demands for rapid and accurate burdening system, an automation forage burdening system was designed using a programmable logic controller （PLC） as the main controller. The communication between PLC ...According to the demands for rapid and accurate burdening system, an automation forage burdening system was designed using a programmable logic controller （PLC） as the main controller. The communication between PLC and force control was achieved by485 bus. This system have many functions such as recipe setup, burdening control, feed mixture, report printing, and remote alarm. The remote surveillance and control of burdening system were realized. The practice shows that the system had high precision and short cycle, and great control effect was obtained.展开更多
针对目前可编程逻辑控制器(Programmable Logic Controller,PLc)程序手动编程烦琐,容易出错,重复劳动量大等问题,提出基于Python语言编程和机器人流程自动化(Robotic Process Automation,RPA)的PLC程序自动组态。文章以西门子博途编程...针对目前可编程逻辑控制器(Programmable Logic Controller,PLc)程序手动编程烦琐,容易出错,重复劳动量大等问题,提出基于Python语言编程和机器人流程自动化(Robotic Process Automation,RPA)的PLC程序自动组态。文章以西门子博途编程软件为例,用Python语言设计界面并读取Excel文件,生成结构化控制语言(Structured Control Language,SCL)格式的外部文件,再通过RPA将其引入博途编程软件,自动生成数据块和子程序,完成程序的全部自动化编写和软件操作。通过验证和测试,证明了此方案切实可行,并且随着PLC应用的日益广泛,具有很高的推广价值。展开更多
文摘This paper proposes to adopt SCADA and PLC technology for the improvement of the performance of real time signaling&train control systems in metro railways.The main concern of this paper is to minimize the failure in automated metro railways system operator and integrate the information coming from Operational Control Centre(OCC),traction SCADA system,traction power control,and power supply system.This work presents a simulated prototype of an automated metro train system operator that uses PLC and SCADA for the real time monitoring and control of the metro railway systems.Here,SCADA is used for the visualization of an automated process operation and then the whole opera-tion is regulated with the help of PLC.The PLC used in this process is OMRON(NX1P2-9024DT1)and OMRON’s Sysmac studio programming software is used for developing the ladder logic of PLC.The metro railways system has deployed infrastructure based on SCADA from the power supply system,and each station’s traction power control is connected to the OCC remotely which commands all of the stations and has the highest command priority.An alarm is triggered in the event of an emergency or system congestion.This proposed system overcomes the drawbacks of the current centralized automatic train control(CATC)system.This system provides prominent benefits like augmenting services which may enhance a network’s full load capacity and networkflexibility,which help in easy modification in the existing program at any time.
基金supported by the Natural Science Foundation of Ningxia province under grant No. NZ1151
文摘According to the demands for rapid and accurate burdening system, an automation forage burdening system was designed using a programmable logic controller （PLC） as the main controller. The communication between PLC and force control was achieved by485 bus. This system have many functions such as recipe setup, burdening control, feed mixture, report printing, and remote alarm. The remote surveillance and control of burdening system were realized. The practice shows that the system had high precision and short cycle, and great control effect was obtained.
文摘传统的电气自动化控制系统存在响应时间慢、维修率高、布线复杂等问题。深入分析可编程逻辑控制器(Programmable Logic Controller,PLC)技术在电气自动化工程中的应用,特别关注其在数学模型、自动化加工控制以及基于比例-积分-微分(Proportional Integral Derivative,PID)算法的包装过程中的应用,旨在提高电气自动化系统的效率和精度,降低成本和维护难度,实现高效和经济的生产目标。
文摘针对目前可编程逻辑控制器(Programmable Logic Controller,PLc)程序手动编程烦琐,容易出错,重复劳动量大等问题,提出基于Python语言编程和机器人流程自动化(Robotic Process Automation,RPA)的PLC程序自动组态。文章以西门子博途编程软件为例,用Python语言设计界面并读取Excel文件,生成结构化控制语言(Structured Control Language,SCL)格式的外部文件,再通过RPA将其引入博途编程软件,自动生成数据块和子程序,完成程序的全部自动化编写和软件操作。通过验证和测试,证明了此方案切实可行,并且随着PLC应用的日益广泛,具有很高的推广价值。
