Modbus4j.jar 实现ModbusTCP JAVA

【Modbus4j.jar 实现ModbusTCP】
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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

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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;
}
}