PLC模拟量输入通道及其在数据采集处理中的应用

PLC Analog Input Channel and its Application in the Data Collection and Process Field

随着微电子技术及计算机技术的发展 ,可编程序控制器的运算功能、接口功能越来越强。A/D及D/A技术引入PLC系统后 ,使PLC不再局限于逻辑控制范围。本文以ModiconMicroPLC的模拟量通道为例 ,介绍利用“寄存器 -数据表”传送指令对PLC模拟量输入通道进行数据采集和处理的方法 ,包括硬件连接、工作流程和梯形图控制程序的编制。

With the development of the micro electronic and microcomputer control,the operation and I/O function of the programmable logic controller has become increasingly powerful.After introducing the A/D and D/A,PLC is currently able to solve more than the simple logic control of discrete output.Taking Modicon Micro PLC analog channel as example,it is fully described how to apply the PLC analog channel to the field of data collection and process,including the hardware deployment,working flow and the detail of ladder program.