1756-L84ES PLC

PLC主要运用的范畴
1.开关量逻辑操控
取代传统的继电器电路，完成逻辑操控、次序操控，既可用于单台设备的操控，也可用于多机群控及自动化流水线。如注塑机、印刷机、订书机械、组合机床、床、包装生产线、电镀流水线等。
2.工业过程操控
在工业生产过程傍边，存在一些如温度、压力、流量、液位和速度等接连变化的量(即模拟量)，PLC采用相应的A/D和D/A转化模块及各种各样的操控算法程序来处理模拟量，完结闭环操控。PID调节是一般闭环操控系统中用得较多的一种调节方法。过程操控在冶金、化工、热处理、锅炉操控等场合有十分广泛的运用。
3.运动操控
PLC可以用于圆周运动或直线运动的操控。一般运用专用的运动操控模块，如可驱动步进电机或伺服电机的单轴或多轴方位操控模块，广泛用于各种机械、机床、机器人、电梯等场合。
描绘
跟着PLC技术的开展，其数据存储区越来越大。如德维森公司的PLC，其数据存储区(DM区)可到达9999个字。这样巨大的数据存储区
可以存储大量数据。数据收集可以用计数器，累计记载收集到的脉冲数，并守时地转存到DM区中去数据收集也可用A/D单元，当模拟量转化成数字量后，再守时地转存到DM区中去PLC还可装备上小型打印机，定时把DM区的数据打出来，
PLC也可与计算机通讯，由计算机把DM区的数据读出，并由计算机再对这些数据作处理。这时，PLC即成为计算机的数据终端,。电力用户曾运用PLC，用以实时记载用户用电情况，以完成不同用电时刻、不同计价的收费方法，鼓励用户在用电低谷时多用电，到达合理用电与节约用电的意图。

The main use of PLC category

1. Switch quantity logic control

Replace the traditional relay circuit, complete the logic control, sequence control, can be used for single equipment control, can also be used for multi-machine group control and automated assembly line. Such as injection molding machines, printing presses, stapler machines, combined machine tools, beds, packaging production lines, electroplating lines, etc.

2. Industrial process control

In the industrial production process, there are some quantities such as temperature, pressure, flow, liquid level and speed that change continuously (that is, analog quantities), PLC uses the corresponding A/D and D/A conversion modules and a variety of control algorithms to deal with analog quantities and complete closed-loop control. PID adjustment is a kind of adjustment method used in general closed-loop control system. Process control is widely used in metallurgy, chemical industry, heat treatment, boiler control and other occasions.

3. Motion control

PLC can be used for circular or linear motion control. Generally use special motion control modules, such as single-axis or multi-axis azimuth control modules that can drive stepper motors or servo motors, widely used in various machinery, machine tools, robots, elevators and other occasions.

depict

With the development of PLC technology, its data storage area is getting larger and larger. For example, the PLC of Devison Company, its data storage area (DM area) can reach 9999 words. Such a huge data storage area

Large amounts of data can be stored. Data collection can use A counter to accumulate the number of pulses collected and transfer them to the DM area on time. Data collection can also be used as A/D unit. When the analog quantity is converted into a digital quantity, it can be transferred to the DM area on time. PLC can also be equipped with a small printer to regularly type out the data in the DM area.

PLC can also communicate with the computer, the data in the DM area is read out by the computer, and the data is processed by the computer. At this time, the PLC becomes the data terminal of the computer. Power users have used PLC to record the user's electricity consumption in real time to complete the charging method of different electricity consumption times and different pricing, to encourage users to use more electricity when the electricity is low, and to achieve the intention of reasonable electricity consumption and saving electricity.

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