1.需求样例
举例5:浮点数参数读取(读取温度测量值)查看参数列表,温度测量值地址为320,根据Modbus协议,读取参数地址转换为16进制为:00H A0H,读取长度为2个字:00H 02H。
16进制发送读取命令如下:00 00 00 00 00 06 01 03 00 A0 00 02(复制使用时去掉中间空格,以16进制发送)00 00 00 00 00 06 01:Modbus命令头,用户直接复制,不能更改03:读取寄存器功能代码00 A0:读取参数寄存器地址16进制代码00 02:读取寄存器地址长度接收到数据格式如下:00 00 00 00 00 07 01 03 04 42 48 02 C8 00 00 00 00 00 07 01:Modbus返回命令头03:读取寄存器功能代码04:返回数据长度,四个字节42 48 02 C8:寄存器数据值,我们将此16进制数转换为浮点数值为:50.002716。注:具体转换方法可以常见附件转换程序算法。
2.实现功能
通过Java与Modbus-TCP/IP网络通讯实现举例5中的功能
3.功能代码
1)
package com.nwpusct.csal.controller.tcpconnect;
import java.io.*;
import java.math.BigInteger;
import java.net.Socket;import com.serotonin.modbus4j.exception.ErrorResponseException;
import com.serotonin.modbus4j.exception.ModbusInitException;
import com.serotonin.modbus4j.exception.ModbusTransportException;
import org.apache.commons.lang.math.NumberUtils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import javax.xml.bind.DatatypeConverter;import static org.apache.poi.util.HexDump.toHex;/*** 类描述:TODO** @author HBO* @date 2023-08-22 09:21**/
public class SocketUtils {private static final Logger LOGGER = LoggerFactory.getLogger(SocketUtils.class);private static Socket socket = null;private static String archivesCenterAPIIP = "127.0.0.1";private static String archivesCenterAPIPort ="502";public static boolean connection() {if (socket != null) {return true;}try {socket = new Socket(archivesCenterAPIIP, NumberUtils.toInt(archivesCenterAPIPort));return true;} catch (Exception e) {LOGGER.error("connection error", e);return false;}}public static void stop() {try {if (socket != null) {socket.close();socket = null;}} catch (Exception e) {LOGGER.error("connection error", e);}}/*** 发送数据** @param cmd* 需要发送的数据(十六进制的字符串形式)* @return 接受到的数据(十六进制的字符串形式)*/public static String sendCmd(String cmd) {if (!connection() || socket == null) {return "error";}try {OutputStream out = socket.getOutputStream();byte[] hexStrToByteArrs = hexStrToByteArrs(cmd);if (hexStrToByteArrs == null) {return "error";}out.write(hexStrToByteArrs);InputStream in = socket.getInputStream();byte[] buf = new byte[1024];int len = in.read(buf);stop();return bytesToHexString(buf) ;} catch (IOException e) {LOGGER.error("sendCmd error", e);return "error";}}/*** 将十六进制的字符串转换成字节数组** @param hexString* @return*/public static byte[] hexStrToByteArrs(String hexString) {if (StringUtils.isEmpty(hexString)) {return null;}hexString = hexString.replaceAll(" ", "");int len = hexString.length();int index = 0;byte[] bytes = new byte[len / 2];while (index < len) {String sub = hexString.substring(index, index + 2);bytes[index / 2] = (byte) Integer.parseInt(sub, 16);index += 2;}return bytes;}/*** 数组转换成十六进制字符串** @param* @return HexString*/public static final String bytesToHexString(byte[] bArray) {StringBuffer sb = new StringBuffer(bArray.length);String sTemp;for (int i = 0; i < bArray.length; i++) {sTemp = Integer.toHexString(0xFF & bArray[i]);if (sTemp.length() < 2)sb.append(0);sb.append(sTemp.toUpperCase());// 在这里故意追加一个逗号便于最后的区分sb.append(" ");}return sb.toString();}/** 将16进制数字解码成字符串,适用于所有字符(包括中文)*/public static String decode(String bytes) {String hexString = "0123456789ABCDEF";ByteArrayOutputStream baos = new ByteArrayOutputStream(bytes.length() / 2);// 将每2位16进制整数组装成一个字节for (int i = 0; i < bytes.length(); i += 2)baos.write((hexString.indexOf(bytes.charAt(i)) << 4 | hexString.indexOf(bytes.charAt(i + 1))));return new String(baos.toByteArray());}/*** 16进制数转换为浮点数值** @param str 16进制数据 424802C8= 50.002716* @throws IOException* @throws ModbusInitException* @throws ModbusTransportException* @throws ErrorResponseException*/public static Float intBitsToFloat(String str) {BigInteger b = new BigInteger(str, 16);float value = Float.intBitsToFloat(b.intValue());return value;}public static void main(String[] args) throws UnsupportedEncodingException {//34.6°String str = sendCmd("00 00 00 00 00 06 01 03 00 04 00 02");
// String str="00 00 00 00 00 06 01 03 00 02 00 02";String x = str.replaceAll("\\s*", "");String s = str.split(" ")[8];String substring = x.substring(18, Integer.parseInt(s) * 2 + 18);System.out.println(substring);System.out.println(intBitsToFloat(substring));}}
2)
package com.nwpusct.csal.controller.tcpconnect;import com.nwpusct.csal.common.util.RestResult;
import com.nwpusct.csal.common.util.RestResultUtil;
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;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;/*** 类描述:TODO* 监测高低温箱温度** @author HBO* @date 2023-08-21 09:34**/
@CrossOrigin
@RestController
@Api(tags = {"监测高低温箱温度"})
@RequestMapping(value = "/modbus")
public class ModbusController {@Value(value = "${high.ip}")public String ip;//从站IP@Value(value = "${high.port}")public int port;//modbus端口@Value(value = "${low.ip}")public String lowIp;@Value(value = "${low.port}")public int lowPort;/*** 工厂。*/static ModbusFactory modbusFactory;static {if (modbusFactory == null) {modbusFactory = new ModbusFactory();}}@GetMapping(value = "/readModbusHigh")@ApiOperation(value = "高温箱")public RestResult<Object> readModbusHigh() {//第二中方式try {Number number = readHoldingRegisterH(1, 320, DataType.FOUR_BYTE_FLOAT);return RestResultUtil.genSuccessResult(number);} catch (Exception e) {return RestResultUtil.genSuccessResult(null);}}/*** 获取master 高温箱** @return* @throws ModbusInitException*/public ModbusMaster getMasterH() throws ModbusInitException {IpParameters params = new IpParameters();params.setHost(ip);params.setPort(port);//// modbusFactory.createRtuMaster(wapper); //RTU 协议// modbusFactory.createUdpMaster(params);//UDP 协议// modbusFactory.createAsciiMaster(wrapper);//ASCII 协议ModbusMaster master = modbusFactory.createTcpMaster(params, false);// TCP 协议master.init();return master;}/*** 读取[03 Holding Register类型 2x]模拟量数据 高温箱** @param slaveId slave Id* @param offset 位置 序列号* @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 Number readHoldingRegisterH(int slaveId, int offset, int dataType)throws ModbusTransportException, ErrorResponseException, ModbusInitException {// 03 Holding Register类型数据读取BaseLocator<Number> loc = BaseLocator.holdingRegister(slaveId, offset, dataType);Number value = getMasterH().getValue(loc);return value;}@GetMapping(value = "/readModbusLow")@ApiOperation(value = "高低温箱")public RestResult<Object> readModbusLow() {try {Number number = readHoldingRegisterL(1, 320, DataType.FOUR_BYTE_FLOAT);return RestResultUtil.genSuccessResult(number);} catch (Exception e) {return RestResultUtil.genSuccessResult(null);}}/*** 获取master 高低温箱** @return* @throws ModbusInitException*/public ModbusMaster getMasterL() throws ModbusInitException {IpParameters params = new IpParameters();params.setHost(lowIp);params.setPort(lowPort);ModbusMaster master = modbusFactory.createTcpMaster(params, false);// TCP 协议master.init();return master;}/*** 读取[03 Holding Register类型 2x]模拟量数据 高低温箱** @param slaveId slave Id* @param offset 位置 序列号* @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 Number readHoldingRegisterL(int slaveId, int offset, int dataType)throws ModbusTransportException, ErrorResponseException, ModbusInitException {// 03 Holding Register类型数据读取BaseLocator<Number> loc = BaseLocator.holdingRegister(slaveId, offset, dataType);Number value = getMasterL().getValue(loc);return value;}
}
4.maven引入依赖包
<dependencies><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId><version>3.9</version></dependency></dependencies><!-- 若想引用modbus4j需要引入下列repository id:ias-snapshots id:ias-releases 两个 ,使用默认仓库下载,不要使用阿里云仓库--><repositories><repository><releases><enabled>false</enabled></releases><snapshots><enabled>true</enabled></snapshots><id>ias-snapshots</id><name>Infinite Automation Snapshot Repository</name><url>https://maven.mangoautomation.net/repository/ias-snapshot/</url></repository><repository><releases><enabled>true</enabled></releases><snapshots><enabled>false</enabled></snapshots><id>ias-releases</id><name>Infinite Automation Release Repository</name><url>https://maven.mangoautomation.net/repository/ias-release/</url></repository></repositories>