plc的介绍和应用(外文翻译).rar
plc的介绍和应用(外文翻译),plc的介绍和应用(外文翻译)包含中文翻译和英文原文,内容详细完整,建议下载参考!中文: 3946 字英文: 11900字符1、动力1968年,richard e. morley创造出了新一代工业控制装置可编程逻辑控制器(plc),现在,plc已经被广泛应用于工业领域,包括机械制造也、运输系统、化学过程设备、等许多其他...
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PLC的介绍和应用(外文翻译)
包含中文翻译和英文原文,内容详细完整,建议下载参考!
中文: 3946 字
英文: 11900字符
1、动力
1968年,Richard E. Morley创造出了新一代工业控制装置可编程逻辑控制器(PLC),现在,PLC已经被广泛应用于工业领域,包括机械制造也、运输系统、化学过程设备、等许多其他领域。初期可编程控制器只是用一种类似于语言的软件逻辑于代替继电器硬件逻辑,并且使开发时间由6个月缩短到6天。
虽然计算机控制技术已经产生,但是PLC控制因为它的高性能、成本低、并且对恶劣的环境有很强的适应能力而在工业控制的广泛应用中保持优势。而且,尽管硬件的价格在逐渐下跌,据估计,根据Frost和Sullivan对PLC市场的调查研究表明,每年销售硬件的价格要比销售PLC的价格(一千五百万)至少多出八十亿美元。PLC的创造者Richard E. Morley十分肯定的认为目前PLC市场是一个价值五十亿的工业
虽然PLC广泛应用于工业控制中,PLC控制系统的程序依然和语法有关。和软件过程一样,PLC的软件设计也以同样的方式会遇到软件错误或危机。Morley在演讲中着重强调了这个方面。
如果房子建造的像软件过程一样,那么仅仅一只啄木鸟就可以摧毁文明。特别的,PLC程序要解决的实际问题是消除软件错误和减少老式梯形逻辑语言的花费。尽管PLC的硬件成本在继续下降,但是在工业控制上减少梯形逻辑的扫描时间仍然是一个问题,以至于可以用到低耗时的PLC。
一般来说,和其他领域相比生产PLC的周期要短很多。例如,在实践中,VISI设计是一种有效的计算机辅助设计。PLC不需要使用目前的以软件设计为基础软件工程方法论,因为PLC程序要求对软件和硬件搜都要考虑到。因此,软件设计越来越成为花费动力。在许多的工业设计工程中 ......
The introduction and application of PLC
1.1Motivation
Programmable Logic Controllers (PLC), a computing device invented by Richard E. Morley in 1968, have been widely used in industry including manufacturing systems, transportation systems, chemical process facilities, and many others. At that time, the PLC replaced the hardwired logic with soft-wired logic or so-called relay ladder logic (RLL), a programming language visually resembling the hardwired logic, and reduced thereby the configuration time from 6 months down to 6 days [Moody and Morley, 1999].
Although PC based control has started to come into place, PLC based control will remain the technique to which the majority of industrial applications will adhere due to its higher performance, lower price, and superior reliability in harsh environments. Moreover, according to a study on the PLC market of Frost and Sullivan [1995], an increase of the annual sales volume to 15 million PLCs per year with the hardware value of more than 8 billion US dollars has been predicted, though the prices of computing hardware is steadily dropping. The inventor of the PLC, Richard E Morley, fairly considers the PLC market as a 5-billion industry at the present time ......
包含中文翻译和英文原文,内容详细完整,建议下载参考!
中文: 3946 字
英文: 11900字符
1、动力
1968年,Richard E. Morley创造出了新一代工业控制装置可编程逻辑控制器(PLC),现在,PLC已经被广泛应用于工业领域,包括机械制造也、运输系统、化学过程设备、等许多其他领域。初期可编程控制器只是用一种类似于语言的软件逻辑于代替继电器硬件逻辑,并且使开发时间由6个月缩短到6天。
虽然计算机控制技术已经产生,但是PLC控制因为它的高性能、成本低、并且对恶劣的环境有很强的适应能力而在工业控制的广泛应用中保持优势。而且,尽管硬件的价格在逐渐下跌,据估计,根据Frost和Sullivan对PLC市场的调查研究表明,每年销售硬件的价格要比销售PLC的价格(一千五百万)至少多出八十亿美元。PLC的创造者Richard E. Morley十分肯定的认为目前PLC市场是一个价值五十亿的工业
虽然PLC广泛应用于工业控制中,PLC控制系统的程序依然和语法有关。和软件过程一样,PLC的软件设计也以同样的方式会遇到软件错误或危机。Morley在演讲中着重强调了这个方面。
如果房子建造的像软件过程一样,那么仅仅一只啄木鸟就可以摧毁文明。特别的,PLC程序要解决的实际问题是消除软件错误和减少老式梯形逻辑语言的花费。尽管PLC的硬件成本在继续下降,但是在工业控制上减少梯形逻辑的扫描时间仍然是一个问题,以至于可以用到低耗时的PLC。
一般来说,和其他领域相比生产PLC的周期要短很多。例如,在实践中,VISI设计是一种有效的计算机辅助设计。PLC不需要使用目前的以软件设计为基础软件工程方法论,因为PLC程序要求对软件和硬件搜都要考虑到。因此,软件设计越来越成为花费动力。在许多的工业设计工程中 ......
The introduction and application of PLC
1.1Motivation
Programmable Logic Controllers (PLC), a computing device invented by Richard E. Morley in 1968, have been widely used in industry including manufacturing systems, transportation systems, chemical process facilities, and many others. At that time, the PLC replaced the hardwired logic with soft-wired logic or so-called relay ladder logic (RLL), a programming language visually resembling the hardwired logic, and reduced thereby the configuration time from 6 months down to 6 days [Moody and Morley, 1999].
Although PC based control has started to come into place, PLC based control will remain the technique to which the majority of industrial applications will adhere due to its higher performance, lower price, and superior reliability in harsh environments. Moreover, according to a study on the PLC market of Frost and Sullivan [1995], an increase of the annual sales volume to 15 million PLCs per year with the hardware value of more than 8 billion US dollars has been predicted, though the prices of computing hardware is steadily dropping. The inventor of the PLC, Richard E Morley, fairly considers the PLC market as a 5-billion industry at the present time ......