BENTLY 88984-02

• 型号：88984-02


• 数量：3


• 制造商： 厦门雄霸电子商务有限公司


• 有效期：2020/10/9 0:00:00

BENTLY 88984-02

BENTLY 88984-02

BENTLY 88984-02

PLC是专为工业自动操控而开发的装置，通常PLC选用面向操控过程，面向问题的“自然言语”编程。不同厂家的产品选用的编程言语不同，这些编程言语有梯形图、句子表、操控系统流程图等。为了增强PLC的各种运算功用，有的PLC还配有BASIC言语，并正在探究用其他高档言语来编程。

日本的FANUC公司、立石公司、三菱公司、富士公司等所出产的PLC产品，都选用梯形图编程。在用编程器向PLC输入程序时，一般简易编程器都选用编码表输入，大型编程器也可用梯形图直接输入。在很多的PLC产品中，由于制作厂家不同，其指令系统的表明办法和句子表中的助记符也不尽相同，但原理是彻底相同的。在本书中我们以FANUC-PMC-L为例，对适用于数控机床操控的PLC指令作一介绍。在FANUC系列的PLC中，规格型号不一起，只是功用指令的数目有所不同，如北京机床研究所与FANUC公司合作开发的FANUC-BESK PLC-B功用指令23条，除此以外，指令系统是彻底一样的。   

在FANUC-PMC-L中有两种指令：根本指令和功用指令。当规划次序程序时，运用最多的是根本指令，根本指令共12条。功用指令便于机床特别运行操控的编程，功用指令有35条。

在根本指令和功用指令执行中，用一个仓库寄存器暂存逻辑操作的中心结果，仓库寄存器有9位（如图1所示），按先进后出、后进先出的原理工作。当前操作结果压入时，仓库各原状况悉数左移一位；相反地取出操作结果时仓库悉数右移一位，最终压入的信号首先恢复读出。

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