JANCD-PC20-487209模块备件使用指导

JANCD-PC20-487209
从结构上分，PLC分为固定式和组合式(模块式)两种。同定式PLC包括CPU板、I/0板、 显示面板、内存块、电源等，这些元素组合成一一个不可拆卸的整体。模块式PLC包括CPU模 块、I/0模块、 内存、电源桃块、底板或机架，这些模块可以按照- -定 规则组合配置.3 CPU 的构成CPU是PLC的核心，神经中枢的作用，每娈PLC至少有一-个CPU，它按PLC的系统程序 赋予的功能接收并存贮用户程序和数据，用扫揭的方式采集由现场输入发置送来的状态或数 据，并存入规定的寄存器中，同时，诊断电源和PLC内部电路的工作状态和编程过程中的语 法错误等。进入运行后，从用户程序存贮器中逐条读取指令，经分析后再按指令规定的任务 产生相应的控制信号，去指挥有关的控制电路。CPU主要由运算器、控制器、寄存器及实现它们之间联系的数据、控制及状态线构成， CPU单元还包括外图芯片、线接口及有关电路。内存主要用于存储程序及数据，是PLC不可 缺少的组成单元。在使用者看来，不必要详细分析CPU的内部电路，但对各部分的工作机制还是应有足够 的理解。CPU的控创器控制CPU工作，由它读取指令、解释指令及执行指令。但T.作节奏由震 荡信号控制.运算器用于进行数字或逻辑运算，在控制器指挥下工作。寄存器参与运算，并 存储运算的中间结果，它也是在控制器指挥下工作。

JANCD-PC20-487209
In terms of structure, PLC is divided into fixed type and combined type (modular type). The same type PLC includes CPU board, i/0 board, display panel, memory block, power supply, etc. these elements are combined into a non removable whole. Modular PLC includes CPU module, i/0 module, memory, power peach block, backplane or rack. These modules can be combined and configured according to certain rules 3 composition of CPU
CPU is the core of PLC and the role of nerve center. Each PLC has at least one CPU. It receives and stores user programs and data according to the functions given by the PLC system program, collects the status or data sent by the on-site input device in the way of scanning, and stores them in the specified registers. At the same time, it diagnoses the working status of the power supply and the internal circuit of PLC and the syntax errors in the programming process. After entering the operation, read the instructions from the user program memory one by one. After analysis, generate corresponding control signals according to the tasks specified in the instructions to command the relevant control circuits.
CPU is mainly composed of arithmetic unit, controller, register and data, control and status lines to realize the connection between them. CPU unit also includes external chip, line interface and related circuits. Memory is mainly used to store programs and data, and is an indispensable component unit of PLC.
In the view of the user, it is not necessary to analyze the internal circuit of the CPU in detail, but there should be enough understanding of the working mechanism of each part. The CPU controller controls the CPU to work, and it reads, interprets and executes instructions. But t. rhythm is controlled by oscillation signal The arithmetic unit is used for digital or logical operation and works under the command of the controller. The register participates in the operation and stores the intermediate results of the operation. It also works under the command of the controller.