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本文介绍了一种基于InTouch和VB,通过DDE交换方式实现上位机与下位机之间的通信软件的实现。 相似文献
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InTouch在DIET生产线监控系统上的使用 总被引:1,自引:1,他引:1
现代自控技术飞速发展,使得上位监控技术得到了广泛的应用。在众多的上位监控软件中,InTouch是一种功能强大、性能稳定的上位监控软件。本简要介绍了InTouch监控软件的功能,以及在韶关二氧化碳膨胀烟丝(DIET)生产线上的应用。 相似文献
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InTouch在油库管理系统中的应用 总被引:4,自引:1,他引:3
Wonderware公司的工控组态软件InTouch在开发上位机监控软件方面具有简单、快捷、稳定、高效的特点,是当今最流行的工控软件开发工具之一。以一个实际系统为例,介绍了其在工业控制领域中的应用。 相似文献
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本文讲述了在计算机分布式计算机控制系统中如何使用VB和InTouch利用DDE动态数据交换方式来实现上位机、下位机之间的数据通信。 相似文献
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摘要:本文以电解铝厂煅烧车间系统接入为背景,从硬件和软件两大方面详细介绍了企业信息化改造实施方案。其中硬件方面涉及底层PLC和环网交换机的连接,以及监控环网的接入;软件方面重点阐述了关于RSlinx的OPC通信的实现和基于InTouch的上位机监控系统的开发。 相似文献
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设计了基于三菱Q系列PLC以及InTouch的颗粒传送系统,提出自动颗粒传送系统的PLC程序设计方法,同时以InTouch为基础设计较为人性化的具有实时性的人机操作界面监控系统。主要阐述了上位机动态监视控制操作画面与下位机PLC数据处理系统结合,使得PLC的编程过程简单化从而使控制更为灵活,更使得PLC的功能得到拓展,其图形化交互式的人机界面,使操作更为简单。并具有实时及历史操作和报警记录。 相似文献
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OMRON公司在提供了冗余CPU之后,进一步推出了冗余CLK单元和冗余以太网单元.这些冗余单元的选择能更好地适应过程控制系统的风险管理需求.以综合水泵房控制系统为例,讲述了OMRON的新一代冗余型PLC系统在发电厂的应用,详细阐述了基于以太网的FINS通信服务原理和冗余网络组建方法. 相似文献
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In most maglev (magnetic levitation) systems, redundant electromagnetic actuators are usually used to increase the stability and robustness of the levitation motion. However, the obvious interactions generate between the redundant actuators and other general electromagnetic actuators. In this paper, a new and efficient redundant levitation control strategy is developed to overcome the interactions in this maglev system. In the strategy, some separate general controllers are designed for all general actuators, and then some special controllers are used to real-time track the electromagnetic forces of all general actuators, and accordingly they create control signal for the redundant actuators to counteract the interactions among general actuators and redundant actuators. To further illustrate the strategy, a novel redundant actuation maglev system is then demonstrated, and a simplified expression of the redundant control strategy is investigated for the maglev system. The experimental results show that the redundant levitation controller successfully removes the interactions between redundant actuator and general actuators, and the redundant levitation controller maintains good robustness under disturbance. 相似文献
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基于分布对象和移动Agent技术,为了提高冗余服务的整体性能,论文设计了一个冗余服务管理模型。通过对移动Agent的属性和行为的定义,实现了对冗余服务的系统管理,包括配置管理、性能管理、失效管理等。 相似文献
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Min Ouyang Qi Fei Ming-Hui Yu Gao-Xia Wang En-Jie Luan 《Simulation Modelling Practice and Theory》2009,17(2):390-397
Many systems in our life contain redundant systems. If one system collapses, its redundant system will substitute it to work for a period of time. In our paper, we have specifically studied the effects of redundant systems on controlling the disaster spreading in networks. Based on the network structure, several redundant strategies have been formulated. On the one hand, the effects of the redundant systems designed uniformly have been studied in different types of networks, the result shows that the random network has been improved the best to fight the disaster. On the other hand, the effectiveness of those redundant strategies have been discussed in the scale free network, results show that the strategy based on total degree is the most effective one to control the spreading. All results found in this paper offer promising perspectives to design redundant systems for preventing cascading failures. 相似文献
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This paper presents a common-cause failure analysis of redundant computer systems. Three mathematical models representing a two-unit redundant computer system are developed. Computer system reliability, steady-state availability, mean time to failure and variance of time to failure formulas are developed. In addition, a general formula for redundant computer system steady-state availability is derived when the failed computer system repair times are described by Erlangian distribution. The computer system reliability, availability and mean time to failure plots are shown. 相似文献
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