PLC接线、电路图~梯形图的转换
电气电路控制和PLC控制之间的原理是相通的，自然的电气控制都可以通过PLC更加方便，高效的演绎，那么电气控制电路具体是怎么产生的？又是怎么样转换为梯形图，进而转化为PLC受控的逻辑指令的，为了更加清晰直观的说明这一路的变化，我们以最简单的：按钮互锁正反转控制电路为例。
一、电气控制部分。 1、按钮互锁正反转控制电路的引入原因。
![](https://wkrtcs.bdimg.com/rtcs/image?w=554.80&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"554.80","h":"312.36","dataType":"jpeg","c":"word/media/image1.jpeg","imgOriW":640,"imgOriH":480})
2，按钮互锁正反转控制的主电路。
![](https://wkrtcs.bdimg.com/rtcs/image?w=606.09&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"606.09","h":"430.80","dataType":"jpeg","c":"word/media/image2.jpeg","imgOriW":640,"imgOriH":480})
3，按钮互锁正反转控制的控制电路。
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image3.jpeg","imgOriW":640,"imgOriH":480})
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image4.jpeg","imgOriW":640,"imgOriH":480})
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image5.jpeg","imgOriW":640,"imgOriH":480})
4，按钮互锁正反转控制电路个元器件的作用
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image6.jpeg","imgOriW":640,"imgOriH":480})
5，按钮互锁正反转控制电路工作原理。
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image7.jpeg","imgOriW":640,"imgOriH":480})
6，按钮互锁正反转控制电路的各种保护措施。
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image8.jpeg","imgOriW":640,"imgOriH":480})
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image9.jpeg","imgOriW":640,"imgOriH":480})
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image10.jpeg","imgOriW":640,"imgOriH":480})
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image11.jpeg","imgOriW":640,"imgOriH":480})
7，按钮互锁正反转控制电路的优缺点。
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image12.jpeg","imgOriW":640,"imgOriH":480})
8，按钮互锁正反转控制电路实物接线图。
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image13.jpeg","imgOriW":640,"imgOriH":480})
二，PLC转化部分。
1，I/O分配设计。
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image14.jpeg","imgOriW":640,"imgOriH":480})
2，PLC硬件连接，外部接线。
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image15.jpeg","imgOriW":640,"imgOriH":480})
3，PLC梯形图。
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image16.jpeg","imgOriW":640,"imgOriH":480})
4，由梯形图转化的逻辑指令。
![](https://wkrtcs.bdimg.com/rtcs/image?w=604.72&md5sum=66d798890d70d999e1e7241a6d8d667e&sign=7fd3e004e4&rtcs_flag=2&rtcs_ver=4&l=webapp&bucketNum=503&ipr={"t":"img","r":"r_12","w":"604.72","h":"453.17","dataType":"jpeg","c":"word/media/image17.jpeg","imgOriW":640,"imgOriH":480})
电气控制电路是PLC实现功能的基础，熟悉电路图是PLC入门的基础！电路图对应逻辑指令的转化在学习的时候可以一步步分析，由浅入深，先易后难，分析方法类似。
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