Modbus4j.jar 实现ModbusTCP

 

 在这章是用"http://download.csdn.net/detail/linxingqianglai/9330571" target="_blank">modbus4j.jar和"http://download.csdn.net/detail/linxingqianglai/9330571" target="_blank">seroUtils.jar导入包实现modbus协议。下面的例子是modbus tcp的demo，下一章是讲modbus urt协议的详解

 package com.example.testhzau;

 import java.util.Date;

 import com.serotonin.modbus4j.ModbusFactory;
 import com.serotonin.modbus4j.ModbusMaster;
 import com.serotonin.modbus4j.exception.ModbusInitException;
 import com.serotonin.modbus4j.exception.ModbusTransportException;
 import com.serotonin.modbus4j.ip.IpParameters;
 import com.serotonin.modbus4j.msg.ModbusRequest;
 import com.serotonin.modbus4j.msg.ModbusResponse;
 import com.serotonin.modbus4j.msg.ReadHoldingRegistersRequest;
 import com.serotonin.modbus4j.msg.WriteRegistersRequest;
 import com.serotonin.modbus4j.msg.WriteRegistersResponse;
 import com.serotonin.util.queue.ByteQueue;
 public class ReadAWriteUtil {
     public static void modbusWTCP(String ip, int port, int slaveId, int start, short[] values) {
         ModbusFactory modbusFactory = new ModbusFactory();
         // 设备ModbusTCP的Ip与端口，如果不设定端口则默认为502
         IpParameters params = new IpParameters();
         params.setHost(ip);
         if (502 != port) {
             params.setPort(port);
         }// 设置端口，默认502
         ModbusMaster tcpMaster = null;
         // 参数1：IP和端口信息 参数2：保持连接激活
         tcpMaster = modbusFactory.createTcpMaster(params, true);
         try {
             tcpMaster.init();
             System.out.println("===============" + 1111111);
         } catch (ModbusInitException e) {
             // System.out.println("11111111111111=="+"此处出现问题了啊!");
             // 如果出现了通信异常信息，则保存到数据库中
              //CommunityExceptionRecord cer = new CommunityExceptionRecord();
             //cer.setDate(new Date());
             //cer.setIp(ip);
             // cer.setRemark(bgName+"出现连接异常");
             // batteryGroupRecordService.saveCommunityException(cer);
         }
         try {
             WriteRegistersRequest request = new WriteRegistersRequest(slaveId, start, values);
             WriteRegistersResponse response = (WriteRegistersResponse) tcpMaster.send(request);
             if (response.isException())
                 System.out.println("Exception response: message=" + response.getExceptionMessage());
             else
                 System.out.println("Success");
         } catch (ModbusTransportException e) {
             e.printStackTrace();
         }
     }

     public static ByteQueue modbusTCP(String ip, int port, int start,int readLenth) {
         ModbusFactory modbusFactory = new ModbusFactory();
         // 设备ModbusTCP的Ip与端口，如果不设定端口则默认为502
         IpParameters params = new IpParameters();
         params.setHost(ip);
         if(502!=port){params.setPort(port);}//设置端口，默认502
         ModbusMaster tcpMaster = null;
             tcpMaster = modbusFactory.createTcpMaster(params, true);
             try {
                 tcpMaster.init();
                 System.out.println("==============="+1111111);
             } catch (ModbusInitException e) {
                 return null;
             }
             ModbusRequest modbusRequest=null;
             try {
                 modbusRequest = new ReadHoldingRegistersRequest(1, start, readLenth);//功能码03
             } catch (ModbusTransportException e) {
                 e.printStackTrace();
             }
             ModbusResponse modbusResponse=null;
             try {
                 modbusResponse = tcpMaster.send(modbusRequest);
             } catch (ModbusTransportException e) {
                 e.printStackTrace();
             }
             ByteQueue byteQueue= new ByteQueue(12);
             modbusResponse.write(byteQueue);
             System.out.println("功能码:"+modbusRequest.getFunctionCode());
             System.out.println("从站地址:"+modbusRequest.getSlaveId());
             System.out.println("收到的响应信息大小:"+byteQueue.size());
             System.out.println("收到的响应信息值:"+byteQueue);
             return byteQueue;
     }
 }