Modbus TCP读取寄存器数据

modbus4j读取寄存器数据

ModbusReadUtil读取工具类

package cn.sync.modbus;

import org.apache.log4j.Logger;

import com.serotonin.modbus4j.BatchRead;
import com.serotonin.modbus4j.BatchResults;
import com.serotonin.modbus4j.ModbusFactory;
import com.serotonin.modbus4j.ModbusMaster;
import com.serotonin.modbus4j.code.DataType;
import com.serotonin.modbus4j.exception.ErrorResponseException;
import com.serotonin.modbus4j.exception.ModbusInitException;
import com.serotonin.modbus4j.exception.ModbusTransportException;
import com.serotonin.modbus4j.ip.IpParameters;
import com.serotonin.modbus4j.locator.BaseLocator;

/**
 * 
 * Modbus TCP协议读取数据
 * @author zyl
 *
 */
public class ModbusReadUtil {
    
	private static Logger logger = Logger.getLogger(ModbusReadUtil.class);
	
	/**
	 * 单列工厂。
	 */
	static ModbusFactory modbusFactory;
	static {
		if (modbusFactory == null) {
			modbusFactory = new ModbusFactory();
		}
	}
	
	/**
	 * 获取master 
	 * @param host  IP地址
	 * @param port  端口号
	 * @return
	 * @throws ModbusInitException
	 */
	public static ModbusMaster getMaster(String host,int port) throws ModbusInitException {
		try {
			IpParameters params = new IpParameters();
			params.setHost(host);
			params.setPort(port);
			ModbusMaster master = modbusFactory.createTcpMaster(params, false);// TCP 协议
			master.init();  //master初始化
			return master;
		} catch (Exception e) {
			logger.error("获取master出现异常"+e);
			e.printStackTrace();
		}
         return null;
	}
	
	
	/**
	 * 读取[03 Holding Register类型 2x]模拟量数据
	 * @param master ModbusMaster对象
	 * @param slaveId  
	 *            slave Id  设备ID
	 * @param offset
	 *            偏移截止位置
	 * @param dataType
	 *            数据类型,来自com.serotonin.modbus4j.code.DataType
	 * @return
	 * @throws ModbusTransportException
	 *             异常
	 * @throws ErrorResponseException
	 *             异常
	 * @throws ModbusInitException
	 *             异常
	 */
	public static Number readHoldingRegister(ModbusMaster master,int slaveId, int offset, int dataType)
			throws ModbusTransportException, ErrorResponseException, ModbusInitException {
		// 03 Holding Register类型数据读取
		BaseLocator loc = BaseLocator.holdingRegister(slaveId, offset, dataType);
		System.out.println("loc:"+loc);
		Number value =master.getValue(loc);
		System.out.println();
		return value;
   }
	
   
	/**
	 * 批量读取使用寄存器数据
	 * @param  master ModbusMaster对象
	 * @param batchRead   批量读取集合
	 * @throws ModbusTransportException
	 * @throws ErrorResponseException
	 * @throws ModbusInitException
	 */
	public static BatchResults batchRead(ModbusMaster master,BatchRead batchRead)throws Exception {
		try {
			batchRead.setContiguousRequests(false);
			BatchResults results = master.send(batchRead);
			return results;
		} catch (Exception e) {
			logger.error("批量读取使用寄存器数据出现异常"+e);
			e.printStackTrace();
		}
		return null;
		
	}
	
	//测试
	public static void main(String[] args) {
		try {
			ModbusMaster master=getMaster("127.0.0.1",502);
			 BatchRead batch = new BatchRead();

				batch.addLocator(0, BaseLocator.holdingRegister(1,1002, DataType.FOUR_BYTE_FLOAT_SWAPPED));
				batch.addLocator(1, BaseLocator.holdingRegister(1,1004, DataType.FOUR_BYTE_FLOAT_SWAPPED));
				batch.addLocator(2, BaseLocator.holdingRegister(1,1006, DataType.FOUR_BYTE_FLOAT_SWAPPED));
				batch.addLocator(3, BaseLocator.holdingRegister(1,1008, DataType.FOUR_BYTE_FLOAT_SWAPPED));
				
				BatchResults batchRead=batchRead(master,batch);
				System.out.println(batchRead.getValue(0));
				System.out.println(batchRead.getValue(1));
				System.out.println(batchRead.getValue(2));
				System.out.println(batchRead.getValue(3));
				//DataType.FOUR_BYTE_FLOAT_SWAPPED  float高低位数据处理
				Number v031 = readHoldingRegister(master,1,1010, DataType.FOUR_BYTE_FLOAT_SWAPPED);// 注意,float
				System.out.println("v031："+v031);
		} catch (Exception e) {
			e.printStackTrace();
		}
		
	}
	
   
}

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