plc和电气工程技术概述-----外文翻译.doc
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plc和电气工程技术概述-----外文翻译,可编程逻辑控制器(plc)或可编程控制器是一种数字化的计算机,应用于机电自动化过程的控制,如工厂流水线机械,游戏机,或照明装置。可编程控制器可用于许多工业和机器。不同于通用计算机,可编程控制器是专为多输入多输出控制要求而设计的装置,plc能适应更大的工作温度范围,更高的抗电气噪音干扰能力,以及更好的抗震抗冲击能力。控制...
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可编程逻辑控制器(PLC)或可编程控制器是一种数字化的计算机,应用于机电自动化过程的控制,如工厂流水线机械,游戏机,或照明装置。可编程控制器可用于许多工业和机器。不同于通用计算机,可编程控制器是专为多输入多输出控制要求而设计的装置,PLC能适应更大的工作温度范围,更高的抗电气噪音干扰能力,以及更好的抗震抗冲击能力。控制机器操作的程序通常存储于备用电池或非挥发性内存中。PLC是一个实时系统实例,因为,其输出结果必须在输入条件下满足响应时间范围才能产生。否则将会导致误操作。plc 与其他控制系统的比较 。PLC 广泛的适用于自动化类任务处理。在工业生产过程中,自动化系统的开发和维护成本占系统譆@杀窘洗蟊壤⑶以谑褂檬倜谀谙低车谋浠强稍て诘摹lc 包含的输入输出设备和工业试验装置和控制元件相兼容,小型电气设计中的需求和设计问题集中在如何表达所需的操作程序。PLC 应用是典型的高度定制系统,因此一个成套的PLC价格相较一个具体定制的控制器设计要低。另一方面,就大批量生产商品而言,用户定制控制系统更经济,这归因于该控制系统部件的成本更低,它是替代“泛型”解决方案的更好选择,并且一次性成本可以覆盖成千上万台器件。对于大批量的或非常简单的自动化任务,可以使用不同的技术。例如,一个用户洗碗机可以由一个量产成本只有几美元的机电凸轮计时器控制
A programmable logic controller (PLC) or programmable controller is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or lighting fixtures. PLCs are used in many industries and machines. Unlike general-purpose computers, the PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed or non-volatile memory. A PLC is an example of a real time system since output results must be produced in response to input conditions within a bounded time, otherwise unintended operation will result.
PLC compared with other control systems
A programmable logic controller (PLC) or programmable controller is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or lighting fixtures. PLCs are used in many industries and machines. Unlike general-purpose computers, the PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed or non-volatile memory. A PLC is an example of a real time system since output results must be produced in response to input conditions within a bounded time, otherwise unintended operation will result.
PLC compared with other control systems