S7协议读写西门子

1.创建项目
2.导入pom文件

	
        com.github.s7connector
        s7connector
        2.1
    

3.创建S7类

package com.ximenzi.s7.test;

import com.github.s7connector.api.DaveArea;
import com.github.s7connector.api.S7Connector;
import com.github.s7connector.api.factory.S7ConnectorFactory;
import com.github.s7connector.impl.serializer.converter.StringConverter;

import java.nio.ByteBuffer;


public class S7 {
    public static void main(String[] args) {
        S7Connector connector = S7ConnectorFactory
                .buildTCPConnector()
                .withHost("192.168.0.21")
                .withPort(102)
                .withTimeout(10000)
                .withRack(0)
                //optional
                .withSlot(1)
                //optional
                .build();
        S7.write(connector);
       // S7Read.read(connector);




    }
    public  static  void   read(S7Connector connector){
        long startTime = System.currentTimeMillis();
        byte[] PlcData = connector.read(
                //选择区块
                DaveArea.DB,
                // 区块编号
                4,
                //字节
                2,
                //偏移
                258);
        long endTime = System.currentTimeMillis();
        System.out.println((endTime-startTime)+"ms");
      //  String str = new String(PlcData);
        //System.out.println(str);
        String str1 = "";
        StringConverter converter = new StringConverter();

        String extract1 = converter.extract(str1.getClass(), PlcData, 0, 0);
        System.out.println("内置方法转换str="+extract1);
        


    }

    public  static  void   write(S7Connector connector){
        //String data = "ytytytt";
        long startTime = System.currentTimeMillis();
        //byte[] bytes = data.getBytes();
        ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES);
        buffer.putLong(5);
        byte[] bytes = buffer.array();
        connector.write(DaveArea.DB,4,258,bytes);
        long endTime = System.currentTimeMillis();
        System.out.println((endTime-startTime)+"ms");
        System.out.print("写入成功");
    }
}