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java對接Modbus協(xié)議代碼示例

更新時(shí)間：2024年03月27日 11:54:38 作者：cocoon-breaking

Modbus是一種串行通信協(xié)議,Modbus已經(jīng)成為工業(yè)領(lǐng)域通信協(xié)議的業(yè)界標(biāo)準(zhǔn),并且現(xiàn)在是工業(yè)電子設(shè)備之間常用的連接方式,這篇文章主要給大家介紹了關(guān)于java對接Modbus協(xié)議的相關(guān)資料,需要的朋友可以參考下

一、Modbus含義

Modbus是一種單主站的主/從通信模式，它定義了一種通訊規(guī)范，用于在工業(yè)自動(dòng)化系統(tǒng)中實(shí)現(xiàn)設(shè)備之間的數(shù)據(jù)交換。Modbus網(wǎng)絡(luò)上只能有一個(gè)主站存在，主站在Modbus網(wǎng)絡(luò)上沒有地址，而從站的地址范圍為0-247，其中0為廣播地址，從站的實(shí)際地址范圍為1-247。

Modbus通信協(xié)議可以通過多種傳輸方式傳播，如RS232C、RS485、光纖和無線電等。它具有兩種串行傳輸模式，即ASCII和RTU，它們定義了數(shù)據(jù)如何打包和解碼的方式。一般來說，支持Modbus協(xié)議的設(shè)備都會支持RTU格式，通信雙方必須同時(shí)支持這兩種模式中的一種。

總結(jié)來說，Modbus是一種用于工業(yè)自動(dòng)化系統(tǒng)的通信協(xié)議，它定義了通信格式和規(guī)范，可以通過不同的傳輸方式進(jìn)行數(shù)據(jù)交換

二、Java如何對接Modbus

1、讀取數(shù)據(jù)

public class Modbus4jUtils {
	/**
	 * 工廠。
	 */
	static ModbusFactory modbusFactory;
	static {
		if (modbusFactory == null) {
			modbusFactory = new ModbusFactory();
		}
	}

	/**
	 * 獲取master
	 * 
	 * @return
	 * @throws ModbusInitException
	 */
	public static ModbusMaster getMaster() throws ModbusInitException {
		IpParameters params = new IpParameters();
		params.setHost("你的硬件ip");
		params.setPort("端口號");
		//
		// modbusFactory.createRtuMaster(wapper); //RTU 協(xié)議
		// modbusFactory.createUdpMaster(params);//UDP 協(xié)議
		// modbusFactory.createAsciiMaster(wrapper);//ASCII 協(xié)議
		ModbusMaster master = modbusFactory.createTcpMaster(params, false);// TCP 協(xié)議
		master.init();

		return master;
	}

	/**
	 * 讀取[01 Coil Status 0x]類型 開關(guān)數(shù)據(jù)
	 * 
	 * @param slaveId
	 *            slaveId
	 * @param offset
	 *            位置
	 * @return 讀取值
	 * @throws ModbusTransportException
	 *             異常
	 * @throws ErrorResponseException
	 *             異常
	 * @throws ModbusInitException
	 *             異常
	 */
	public static Boolean readCoilStatus(int slaveId, int offset)
			throws ModbusTransportException, ErrorResponseException, ModbusInitException {
		// 01 Coil Status
		BaseLocator<Boolean> loc = BaseLocator.coilStatus(slaveId, offset);
		Boolean value = getMaster().getValue(loc);
		return value;
	}

	/**
	 * 讀取[02 Input Status 1x]類型 開關(guān)數(shù)據(jù)
	 * 
	 * @param slaveId
	 * @param offset
	 * @return
	 * @throws ModbusTransportException
	 * @throws ErrorResponseException
	 * @throws ModbusInitException
	 */
	public static Boolean readInputStatus(int slaveId, int offset)
			throws ModbusTransportException, ErrorResponseException, ModbusInitException {
		// 02 Input Status
		BaseLocator<Boolean> loc = BaseLocator.inputStatus(slaveId, offset);
		Boolean value = getMaster().getValue(loc);
		return value;
	}

	/**
	 * 讀取[03 Holding Register類型 2x]模擬量數(shù)據(jù)
	 * 
	 * @param slaveId
	 *            slave Id
	 * @param offset
	 *            位置
	 * @param dataType
	 *            數(shù)據(jù)類型,來自com.serotonin.modbus4j.code.DataType
	 * @return
	 * @throws ModbusTransportException
	 *             異常
	 * @throws ErrorResponseException
	 *             異常
	 * @throws ModbusInitException
	 *             異常
	 */
	public static Number readHoldingRegister(int slaveId, int offset, int dataType)
			throws ModbusTransportException, ErrorResponseException, ModbusInitException {
		// 03 Holding Register類型數(shù)據(jù)讀取
		BaseLocator<Number> loc = BaseLocator.holdingRegister(slaveId, offset, dataType);
		Number value = getMaster().getValue(loc);
		return value;
	}

	/**
	 * 讀取[04 Input Registers 3x]類型 模擬量數(shù)據(jù)
	 * 
	 * @param slaveId
	 *            slaveId
	 * @param offset
	 *            位置
	 * @param dataType
	 *            數(shù)據(jù)類型,來自com.serotonin.modbus4j.code.DataType
	 * @return 返回結(jié)果
	 * @throws ModbusTransportException
	 *             異常
	 * @throws ErrorResponseException
	 *             異常
	 * @throws ModbusInitException
	 *             異常
	 */
	public static Number readInputRegisters(int slaveId, int offset, int dataType)
			throws ModbusTransportException, ErrorResponseException, ModbusInitException {
		// 04 Input Registers類型數(shù)據(jù)讀取
		BaseLocator<Number> loc = BaseLocator.inputRegister(slaveId, offset, dataType);
		Number value = getMaster().getValue(loc);
		return value;
	}
}

2.寫入數(shù)據(jù)

public class Modbus4jWriteUtils {
	static Log log = LogFactory.getLog(Modbus4jWriteUtils.class);
	/**
	 * 工廠。
	 */
	static ModbusFactory modbusFactory;
	static {
		if (modbusFactory == null) {
			modbusFactory = new ModbusFactory();
		}
	}

	/**
	 * 獲取tcpMaster
	 *
	 * @return
	 * @throws ModbusInitException
	 */
	public static ModbusMaster getMaster() throws ModbusInitException {
		IpParameters params = new IpParameters();
		params.setHost("你的硬件地址");
		params.setPort("端口號");

		ModbusMaster tcpMaster = modbusFactory.createTcpMaster(params, false);
		tcpMaster.init();

		return tcpMaster;
	}

	/**
	 * 寫 [01 Coil Status(0x)]寫一個(gè) function ID = 5
	 *
	 * @param slaveId
	 *            slave的ID
	 * @param writeOffset
	 *            位置
	 * @param writeValue
	 *            值
	 * @return 是否寫入成功
	 * @throws ModbusTransportException
	 * @throws ModbusInitException
	 */
	public static boolean writeCoil(int slaveId, int writeOffset, boolean writeValue)
			throws ModbusTransportException, ModbusInitException {
		// 獲取master
		ModbusMaster tcpMaster = getMaster();
		// 創(chuàng)建請求
		WriteCoilRequest request = new WriteCoilRequest(slaveId, writeOffset, writeValue);
		// 發(fā)送請求并獲取響應(yīng)對象
		WriteCoilResponse response = (WriteCoilResponse) tcpMaster.send(request);
		if (response.isException()) {
			return false;
		} else {
			return true;
		}
	}

	/**
	 * 寫[01 Coil Status(0x)] 寫多個(gè) function ID = 15
	 *
	 * @param slaveId
	 *            slaveId
	 * @param startOffset
	 *            開始位置
	 * @param bdata
	 *            寫入的數(shù)據(jù)
	 * @return 是否寫入成功
	 * @throws ModbusTransportException
	 * @throws ModbusInitException
	 */
	public static boolean writeCoils(int slaveId, int startOffset, boolean[] bdata)
			throws ModbusTransportException, ModbusInitException {
		// 獲取master
		ModbusMaster tcpMaster = getMaster();
		// 創(chuàng)建請求
		WriteCoilsRequest request = new WriteCoilsRequest(slaveId, startOffset, bdata);
		// 發(fā)送請求并獲取響應(yīng)對象
		WriteCoilsResponse response = (WriteCoilsResponse) tcpMaster.send(request);
		if (response.isException()) {
			return false;
		} else {
			return true;
		}

	}

	/***
	 * 寫[03 Holding Register(4x)] 寫一個(gè) function ID = 6
	 *
	 * @param slaveId
	 * @param writeOffset
	 * @param writeValue
	 * @return
	 * @throws ModbusTransportException
	 * @throws ModbusInitException
	 */
	public static boolean writeRegister(int slaveId, int writeOffset, short writeValue)
			throws ModbusTransportException, ModbusInitException {
		// 獲取master
		ModbusMaster tcpMaster = getMaster();
		// 創(chuàng)建請求對象
		WriteRegisterRequest request = new WriteRegisterRequest(slaveId, writeOffset, writeValue);
		WriteRegisterResponse response = (WriteRegisterResponse) tcpMaster.send(request);
		if (response.isException()) {
			log.error(response.getExceptionMessage());
			return false;
		} else {
			return true;
		}

	}

	/**
	 *
	 * 寫入[03 Holding Register(4x)]寫多個(gè) function ID=16
	 *
	 * @param slaveId
	 *            modbus的slaveID
	 * @param startOffset
	 *            起始位置偏移量值
	 * @param sdata
	 *            寫入的數(shù)據(jù)
	 * @return 返回是否寫入成功
	 * @throws ModbusTransportException
	 * @throws ModbusInitException
	 */
	public static boolean writeRegisters(int slaveId, int startOffset, short[] sdata)
			throws ModbusTransportException, ModbusInitException {
		// 獲取master
		ModbusMaster tcpMaster = getMaster();
		// 創(chuàng)建請求對象
		WriteRegistersRequest request = new WriteRegistersRequest(slaveId, startOffset, sdata);
		// 發(fā)送請求并獲取響應(yīng)對象
		ModbusResponse response = tcpMaster.send(request);
		if (response.isException()) {
			log.error(response.getExceptionMessage());
			return false;
		} else {
			return true;
		}
	}

	/**
	 * 寫入數(shù)字類型的模擬量（如:寫入Float類型的模擬量、Double類型模擬量、整數(shù)類型Short、Integer、Long）
	 *
	 * @param slaveId
	 * @param offset
	 * @param value
	 *            寫入值,Number的子類,例如寫入Float浮點(diǎn)類型,Double雙精度類型,以及整型short,int,long
	 * @param registerCount
	 * ,com.serotonin.modbus4j.code.DataType
	 * @throws ModbusTransportException
	 * @throws ErrorResponseException
	 * @throws ModbusInitException
	 */
	public static void writeHoldingRegister(int slaveId, int offset, Number value, int dataType)
			throws ModbusTransportException, ErrorResponseException, ModbusInitException {
		// 獲取master
		ModbusMaster tcpMaster = getMaster();
		// 類型
		BaseLocator<Number> locator = BaseLocator.holdingRegister(slaveId, offset, dataType);
		tcpMaster.setValue(locator, value);
	}
 
}