型号:3BHB003689
品牌:ABB
在轴承上加油时,只要把润滑脂加到能平平地封住钢珠即可从PLC的组成来看,除CPU,存储器及通信接口外,与工业现场直接有关的还有哪些接口?并说明其主要功能。(1)输入接口:接受被控设备的信号,并通过光电耦合器件和输入电路驱动内部电路接通或断开。(2)输出接口:程序的执行结果通过输出接口的光电耦合器件和输出组件(继电器、晶闸管、晶体管)输出,控制外部负载的接通或断开。2、PLC的基本单元由哪几个部份组成?各起什么作用?(1)CPU:PLC的核心部件,指挥PLC进行各种工作。如接受用户程序和数据、诊断、执行执行程序等;(2)存储器:存储系统和用户的程序和数据;(3)I/O接口:PLC与工业生产现场被控对象之间的连接部件,用来接受被控设备的信号和输出程序的执行结果;(4)通信接口:通过通信接口与监视器、打印机等其他设备进行信息交换;(5)日前,ABB与全球领先的交通运输解决方案提供商斯堪尼亚(Scania)达成协一、低电压大电流PLC系统的工作任务相对简单,因此需要传输的数据量一般不会太大,所以常见的PLC系统为一层网络结构。
When refueling on the bearing, as long as the grease is added to the steel ball can be flat from the composition of PLC, in addition to the CPU, memory and communication interface, and what are the interfaces directly related to the industrial site? And explain its main functions. (1) Input interface: accept the signal of the controlled device, and through the photoelectric coupler and input circuit drive the internal circuit on or off. (2) Output interface: the execution results of the program are output through the photoelectric coupler and output components (relays, thyristors, transistors) of the output interface to control the switching on or off of the external load. 2. Which parts are the basic unit of PLC composed of? What role does each play? (1) CPU: the core component of PLC, directing PLC to carry out various work. Such as receiving user programs and data, diagnosis, execution of executive procedures, etc.; (2) Storage: storage system and user programs and data; (3) I/O interface: the connection part between PLC and the controlled object in the industrial production site, which is used to accept the signal of the controlled equipment and output the execution result of the program; (4) Communication interface: information exchange with monitors, printers and other devices through communication interface; (5) Recently, ABB and Scania, the world’s leading transportation solution provider, have reached a cooperative, low-voltage and high-current PLC system with relatively simple tasks, so the amount of data needed to be transmitted is generally not too large, so the common PLC system is a one-layer network structure.
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