This paper proposes the main factors affecting the reliability of control systems with PLC, then several methods to improve it are also discussed.
分析了影响PLC控制系统可靠性的主要因素，探讨了提高控制系统可靠性的硬、软件措施，这些措施均具有实用价值。
The reliability of control systems is the key to operate normally for the systems. It has very important signification to ensure the reliability and the security of modern complex systems.
控制系统的可靠性是系统能投入运行的关键，切实保障现代复杂系统的可靠性和安全性，具有十分重要的意义。
On the basis of discussing the reliability theory by total distributed control systems, it puts forward the reliability design of series hardware circuit.
在简要论述集散型控制系统可靠性理论的基础上，提出放大器硬件电路的可靠性设计。
The EPA field instruments are the important parts of the EPA control systems. Low power consumption, reliability and real time are their special requirements.
EPA现场仪表是EPA控制系统的重要组成部分，它在低功耗、可靠性、实时性等方面都有着特殊的要求。
Its reliability and anti disturbance affect normal running of the control systems.
其工作的可靠性和抗扰性直接影响到控制系统的正常运行。
The paper discusses the reliability of some fault tolerance control systems, and gives the calculating formula in detail.
本文探讨了几种常用的容错控制系统的可靠性，并给出了具体的指标计算方式。
The simulation debugging is an important process in the perfect design of the application programs for computer control systems in order to ensure system performance and reliability.
工控应用程序的完善设计是保证计算机控制系统的性能与可靠性的一个重要措施，而仿真调试是使应用程序完善化的一个重要环节。
Redundancy management is a key means of improving the reliability of safety-critical flyby-wire flight control systems.
余度设计是提高电传飞行控制系统安全性与任务可靠性的一种重要手段。
By the method, robust reliability measure of robust stability degree of interval delay-independent control systems and the maximum allowable ranges of the basic parameters can be given.
用文中方法可给出时滞不确定控制系统稳定程度的可靠性度量和为保证稳定性所要求的基本参数的最大容许变异范围。
In this paper, a systematic analysis of reliability and availability is given to the decentralized control systems.
本文的主旨在于探讨计算机分散控制系统可靠性问题。
Perfect quality control systems insure high quatily and reliability of products.
完善的质量保证体系确保了产品的高质量和高可靠性。
Reliability model of protection and control systems is created by a system effectiveness approach including hardware module, interface module, functional module and effective module.
采用元件可靠度和系统可靠度两个可靠性指标，提出功效评估法：通过硬件模块、接口模块、功能模块、功效模块对继电保护及控制系统进行建模。
The protection and control system in subway DC power supply systems play a key role in ensuring the safety and reliability of the subway.
地铁直流供电的保护与控制系统对确保地铁的安全可靠运行起着关键作用。
As one of key control systems in the nuclear reactor, the nuclear reactor power control system is complicated, and requires very high level of reliability.
功率控制系统是反应堆的一关键控制系统，系统复杂，可靠性要求高。
The flight control computer plays a kernel role in flight control systems. Ultra reliability is needed to ensure that the ratio of system failure is less than 10-8 /hour.
在飞行控制系统中，飞行控制计算机起着核心作用，要求具有极高的可靠性，整个系统的失效率要求小于10-8/小时。
Power system exciter was designed using the control theory of uncertain systems to enhance the stability and reliability of power systems in different operational states.
为了提高电力系统在各种工况下的稳定性和可靠性，采用不确定性控制理论设计了励磁控制器。
The simplicity of laser guidance systems which operate on Bang-Bang control pattern makes them have high reliability and low cost.
继电控制式激光制导系统的简单性使它具有高可靠性、低成本等优点。
Some display and control systems need a kind of high performance, high reliability graphics generator, and it must work in rugged conditions.
在某些应用场合需要适应苛刻工作环境要求的高性能、高可靠性嵌入式图形发生器。
Spaceflight control software systems are of very high reliability requirements. Reliability testing is necessary for spaceflight control software systems.
航天飞控软件是具有高可靠性要求的软件系统，对其进行可靠性测试是航天飞控任务的基本要求。
Through analyzing the safety control systems of several offshore platforms, an optimal design is obtained, which can satisfy the requirements both for reliability and cost-effective.
通过对海上平台安全控制系统的结构分析，获得海上安全控制系统最佳设计方法，既能满足安全可靠性的要求，又能满足经济实用性要求。
Finally, practice has proved that the adoption of PLC control systems have greatly increased the machine's reliability and reduced workload of machine maintenance staff.
最后通过实践证明，采用PLC控制提高了万能铣床运行的可靠性，减轻了机床维修人员的工作量。
High reliability is required for spaceflight control software systems. But the reliability of spaceflight control software has not been quantitatively measured and managed.
航天飞行控制软件是一种具有高可靠性要求的软件系统，但是目前对航天飞控软件的可靠性还没有进行定量的度量和管理。
The data structure is studied based on the features that the systems needed high reliability in the transmission of network control data.
根据网络管理信息传输要求高可靠性的特点，探讨其应采取的数据结构。
High speed, high accuracy, high efficiency and high reliability are the four key specifications of the high performance modern numerical control systems.
高速度、高精度、高效率和高可靠性是现代数控高性能化的四项关键指标。
To maintain the high reliability of the cryogenic facility, a new control system has been planned with the PLC and SCADA systems.
保持高可靠性的低温设施，一个新的控制系统已规划与PLC和SCADA系统。
Redundancy design is an effective way to improve the system security and mission reliability of the flight control systems.
冗余设计是提高飞行控制系统安全性与任务可靠性的一种重要手段。
The court said that the reliability and enforceability of intermittent control systems was questionable, since they may not be implemented when needed;
法院声称，间歇性控制体系的可靠性和实施性很成问题，因为需要时不一定用得上。
The court said that the reliability and enforceability of intermittent control systems was questionable, since they may not be implemented when needed;
法院声称，间歇性控制体系的可靠性和实施性很成问题，因为需要时不一定用得上。
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