IC693PIF350

IC693PIF350 下面分别介绍PLC的各组成部分及其作用，以便用户进一步了解PLC的控制原理和工作过程。

（1）CPU

CPU是PLC的控制中枢，PLC在CPU的控制下有条不紊地协调工作，从而实现对现场的各个设备进行控制。CPU由微处理器和控制器组成，它可以实现逻辑运算和数学运算，协调控制系统内部各部分的工作。

控制器的作用是控制整个微处理器的各个部件有条不紊的进行工作，它的基本功能就是从内存中读取指令和执行指令。

（2）存储器

PLC配有两种存储器，即系统存储器和用户存储器。系统存储器用来存放系统管理程序，用户不能访问和修改这部分存储器的内容。用户存储器用来存放编制的应用程序和工作数据状态。存放工作数据状态的用户存储器部分也称为数据存储区，它包括输入/输出数据映像区、定时器/计数器预置数和当前值的数据区及存放中间结果的缓冲区。

IC693PIF350  

Reliance Electric Circuit Board 0-54349 054349 0 54349 

Reliance Electric Company 0-51874 Module 051874 USED

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61241160R Reliance Electric Cable

RELIANCE ELECTRIC 0-57407-4F 0574074F PROCESSOR 

RELIANCE ELECTRIC TRANSFORMER 707005-R

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Reliance Electric GP-2000 AC Drive 1GN026535 25HP 460V 

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Reliance Electric Circuit Board 0-54349 054349 0 54349 

RELIANCE ELECTRIC MODEL RECTIFIER STACK 8647510S 1000V

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NIB RELIANCE ELECTRIC COIL 120 VAC 608831-4R

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Reliance Electric 0-48653-3 PC Tachometer

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GV3000/SE AC Drive Reliance Electric

RELIANCE ELECTRIC 2DF4283 MAINS FILTER GOOD TAKEOUT

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RELIANCE ELECTRIC DUAL CONTACT 45C166 *NEW*

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Reliance Electric DC Drive Flexpak Plus 14C108-1U 3Hp

Reliance Electric Flex Pak Plus VS Drive 5 HP # 14C63

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Reliance Electric Ac Vs Drive 2gu41020

Reliance Electric Max Pak Plus RPM III D-C Manual

Reliance Electric 0-51486-17 Relay Input

3 HP Reliance Electric AC VS Drive Model 2GU41003

Reliance Electric DC Drive Flexpak Plus 14C103-1U 3Hp

IC693PIF350