一個項目,需要用Java實現使用ModbusTCP和硬件設備通信
資料
代碼下載
- 本文的代碼和仿真軟件:藍奏雲下載
官網資料
關於Java的開源庫
- Jamod:Java Modbus實現:Java Modbus庫。該庫由Dieter Wimberger實施。
- ModbusPal:ModbusPal是一個正在進行的Java項目,用於創建逼真的Modbus從站模擬器。由於預定義的數學函數和/或Python腳本,寄存器值是動態生成的。ModbusPal依賴於RxTx進行串行通信,而Jython則依賴於腳本支持。
- Modbus4J:Serotonin Software用Java編寫的Modbus協議的高性能且易於使用的實現。支持ASCII,RTU,TCP和UDP傳輸作爲從站或主站,自動請求分區,響應數據類型解析和節點掃描。
- JLibModbus:JLibModbus是java語言中Modbus協議的一種實現。jSSC和RXTX用於通過串行端口進行通信。該庫是一個經過積極測試和改進的項目。
博客資料
Github資料
ModbusTCP協議
Modbus由MODICON公司於1979年開發,是一種工業現場總線協議標準。1996年施耐德公司推出基於以太網TCP/IP的Modbus協議:ModbusTCP。
Modbus協議是一項應用層報文傳輸協議,包括ASCII、RTU、TCP三種報文類型。
標準的Modbus協議物理層接口有RS232、RS422、RS485和以太網接口,採用master/slave方式通信。
個人感覺:
modbus協議也是對
地址變量
進行讀取或者寫入操作,變化的可能是地址變量的地址
和數據類型
。
這個功能碼(指定要做什麼,指定存儲器,然後指定動作:是讀啊,是寫啊,還是對多個一起操作啊)Modbus和RS485的關係:Modbus是協議,物理層接口有RS232、RS422、RS485和以太網接口幾種
仿真軟件
驗證4個常用功能碼,仿真軟件上面有F=01,F=02,F=03和F=04來顯示
- 0x01:讀線圈
- 0x02:讀離散量輸入
- 0x03:讀保持寄存器
- 0x04:讀輸入寄存器
對應的代碼要寫4個方法
我要寫一個Master(主站),所以需要一個Slave(從站)
- Modbus Slave下載
- 安裝:一直下一步
- 激活碼:5455415451475662(來源)
- 激活:Connection-->connect...(F3),輸入激活碼,下面截圖沒輸入激活碼,因爲當時沒找到激活碼
選擇TCP模式,端口是固定的502
地址類型
F8:
Slave Definition
功能碼
數據類型
功能碼01
功能碼02
功能碼03,選擇Float類型
雙擊第一個地址輸入數據,會提示輸入數據的類型,32位數據佔2個地址,所以下一個地址是--
功能碼04
使用jlibmodbus
- 參考:Java實現ModBus的poll端(主機master端,查詢和接受數據)
- 源碼1:https://sourceforge.net/projects/jlibmodbus/
- 源碼2:https://github.com/kochedykov/jlibmodbus
特別有意思:常用的串口通信庫都加進去了
maven依賴
<dependency>
<groupId>com.intelligt.modbus</groupId>
<artifactId>jlibmodbus</artifactId>
<version>1.2.9.7</version>
</dependency>
測試功能碼04
package com.tcb.jlibmodbus;
import java.net.InetAddress;
import com.intelligt.modbus.jlibmodbus.Modbus;
import com.intelligt.modbus.jlibmodbus.exception.ModbusIOException;
import com.intelligt.modbus.jlibmodbus.exception.ModbusNumberException;
import com.intelligt.modbus.jlibmodbus.exception.ModbusProtocolException;
import com.intelligt.modbus.jlibmodbus.master.ModbusMaster;
import com.intelligt.modbus.jlibmodbus.master.ModbusMasterFactory;
import com.intelligt.modbus.jlibmodbus.tcp.TcpParameters;
/**
- Hello world!
*/
public class App {
public static void main(String[] args) {
try {
// 設置主機TCP參數
TcpParameters tcpParameters = new TcpParameters();
<span class="hljs-comment">// 設置TCP的ip地址</span>
InetAddress adress = InetAddress.getByName(<span class="hljs-string">"127.0.0.1"</span>);
<span class="hljs-comment">// TCP參數設置ip地址</span>
<span class="hljs-comment">// tcpParameters.setHost(InetAddress.getLocalHost());</span>
tcpParameters.setHost(adress);
<span class="hljs-comment">// TCP設置長連接</span>
tcpParameters.setKeepAlive(<span class="hljs-keyword">true</span>);
<span class="hljs-comment">// TCP設置端口,這裏設置是默認端口502</span>
tcpParameters.setPort(Modbus.TCP_PORT);
<span class="hljs-comment">// 創建一個主機</span>
ModbusMaster master = ModbusMasterFactory.createModbusMasterTCP(tcpParameters);
Modbus.setAutoIncrementTransactionId(<span class="hljs-keyword">true</span>);
<span class="hljs-keyword">int</span> slaveId = <span class="hljs-number">1</span>;<span class="hljs-comment">//從機地址</span>
<span class="hljs-keyword">int</span> offset = <span class="hljs-number">0</span>;<span class="hljs-comment">//寄存器讀取開始地址</span>
<span class="hljs-keyword">int</span> quantity = <span class="hljs-number">10</span>;<span class="hljs-comment">//讀取的寄存器數量</span>
<span class="hljs-keyword">try</span> {
<span class="hljs-keyword">if</span> (!master.isConnected()) {
master.connect();<span class="hljs-comment">// 開啓連接</span>
}
<span class="hljs-comment">// 讀取對應從機的數據,readInputRegisters讀取的寫寄存器,功能碼04</span>
<span class="hljs-keyword">int</span>[] registerValues = master.readInputRegisters(slaveId, offset, quantity);
<span class="hljs-comment">// 控制檯輸出</span>
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> value : registerValues) {
System.out.println(<span class="hljs-string">"Address: "</span> + offset++ + <span class="hljs-string">", Value: "</span> + value);
}
} <span class="hljs-keyword">catch</span> (ModbusProtocolException e) {
e.printStackTrace();
} <span class="hljs-keyword">catch</span> (ModbusNumberException e) {
e.printStackTrace();
} <span class="hljs-keyword">catch</span> (ModbusIOException e) {
e.printStackTrace();
} <span class="hljs-keyword">finally</span> {
<span class="hljs-keyword">try</span> {
master.disconnect();
} <span class="hljs-keyword">catch</span> (ModbusIOException e) {
e.printStackTrace();
}
}
} <span class="hljs-keyword">catch</span> (RuntimeException e) {
<span class="hljs-keyword">throw</span> e;
} <span class="hljs-keyword">catch</span> (Exception e) {
e.printStackTrace();
}
}
}
打印到控制檯的信息
Address: 0, Value: 88
Address: 1, Value: 66
Address: 2, Value: 8
Address: 3, Value: 6
Address: 4, Value: 32727
Address: 5, Value: 32808
Address: 6, Value: 0
Address: 7, Value: 3
Address: 8, Value: 2
Address: 9, Value: 1
使用modbus4j
maven依賴
- 官方說明:https://github.com/infiniteautomation/modbus4j
- 有個坑:Maven配的阿里雲倉庫,下載不下來,註釋掉阿里雲倉庫使用默認倉庫才能下載好。
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.tcb</groupId>
<artifactId>modbus</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>modbus</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<!-- 若想引用modbus4j需要引入下列repository id:ias-snapshots id:ias-releases 兩個 ,使用默認倉庫下載,不要使用阿里雲倉庫–>
<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>
<span class="hljs-tag"><<span class="hljs-name">dependencies</span>></span>
<span class="hljs-tag"><<span class="hljs-name">dependency</span>></span>
<span class="hljs-tag"><<span class="hljs-name">groupId</span>></span>junit<span class="hljs-tag"></<span class="hljs-name">groupId</span>></span>
<span class="hljs-tag"><<span class="hljs-name">artifactId</span>></span>junit<span class="hljs-tag"></<span class="hljs-name">artifactId</span>></span>
<span class="hljs-tag"><<span class="hljs-name">version</span>></span>4.13-beta-3<span class="hljs-tag"></<span class="hljs-name">version</span>></span>
<span class="hljs-tag"><<span class="hljs-name">scope</span>></span>test<span class="hljs-tag"></<span class="hljs-name">scope</span>></span>
<span class="hljs-tag"></<span class="hljs-name">dependency</span>></span>
<span class="hljs-tag"><<span class="hljs-name">dependency</span>></span>
<span class="hljs-tag"><<span class="hljs-name">groupId</span>></span>com.infiniteautomation<span class="hljs-tag"></<span class="hljs-name">groupId</span>></span>
<span class="hljs-tag"><<span class="hljs-name">artifactId</span>></span>modbus4j<span class="hljs-tag"></<span class="hljs-name">artifactId</span>></span>
<span class="hljs-tag"><<span class="hljs-name">version</span>></span>3.0.3<span class="hljs-tag"></<span class="hljs-name">version</span>></span>
<span class="hljs-tag"></<span class="hljs-name">dependency</span>></span>
<span class="hljs-tag"><<span class="hljs-name">dependency</span>></span>
<span class="hljs-tag"><<span class="hljs-name">groupId</span>></span>org.apache.commons<span class="hljs-tag"></<span class="hljs-name">groupId</span>></span>
<span class="hljs-tag"><<span class="hljs-name">artifactId</span>></span>commons-lang3<span class="hljs-tag"></<span class="hljs-name">artifactId</span>></span>
<span class="hljs-tag"><<span class="hljs-name">version</span>></span>3.9<span class="hljs-tag"></<span class="hljs-name">version</span>></span>
<span class="hljs-tag"></<span class="hljs-name">dependency</span>></span>
<span class="hljs-tag"></<span class="hljs-name">dependencies</span>></span>
</project>
Java實現modbus協議通訊
原文鏈接:http://www.leftso.com/blog/83.html
核心依賴:
- modbus4j.jar
- commons-lang3-3.0.jar
Modbus4jUtils類
package com.tcb.modbus;
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通訊工具類,採用modbus4j實現
-
@author lxq
-
@dependencies modbus4j-3.0.3.jar
-
@website https://github.com/infiniteautomation/modbus4j
/
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(“localhost”);
params.setPort(502);
//
// modbusFactory.createRtuMaster(wapper); //RTU 協議
// modbusFactory.createUdpMaster(params);//UDP 協議
// modbusFactory.createAsciiMaster(wrapper);//ASCII 協議
ModbusMaster master = modbusFactory.createTcpMaster(params, false);// TCP 協議
master.init();return master;
}
/**
- 讀取[01 Coil Status 0x]類型 開關數據
- @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 開關數據
- @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]模擬量數據
- @param slaveId
-
slave Id
- @param offset
-
位置
- @param dataType
-
數據類型,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類型數據讀取
BaseLocator<Number> loc = BaseLocator.holdingRegister(slaveId, offset, dataType);
Number value = getMaster().getValue(loc);
return value;
}/**
- 讀取[04 Input Registers 3x]類型 模擬量數據
- @param slaveId
-
slaveId
- @param offset
-
位置
- @param dataType
-
數據類型,來自com.serotonin.modbus4j.code.DataType
- @return 返回結果
- @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類型數據讀取
BaseLocator<Number> loc = BaseLocator.inputRegister(slaveId, offset, dataType);
Number value = getMaster().getValue(loc);
return value;
}/**
-
批量讀取使用方法
-
@throws ModbusTransportException
-
@throws ErrorResponseException
-
@throws ModbusInitException
*/
public static void batchRead() throws ModbusTransportException, ErrorResponseException, ModbusInitException {BatchRead<Integer> batch = new BatchRead<Integer>();
batch.addLocator(0, BaseLocator.holdingRegister(1, 1, DataType.FOUR_BYTE_FLOAT));
batch.addLocator(1, BaseLocator.inputStatus(1, 0));ModbusMaster master = getMaster();
batch.setContiguousRequests(false);
BatchResults<Integer> results = master.send(batch);
System.out.println(results.getValue(0));
System.out.println(results.getValue(1));
}
/**
-
測試
-
@param args
*/
public static void main(String[] args) {
try {
// 01測試
Boolean v011 = readCoilStatus(1, 0);
Boolean v012 = readCoilStatus(1, 1);
Boolean v013 = readCoilStatus(1, 6);
System.out.println(“v011:” + v011);
System.out.println(“v012:” + v012);
System.out.println(“v013:” + v013);
// 02測試
Boolean v021 = readInputStatus(1, 0);
Boolean v022 = readInputStatus(1, 1);
Boolean v023 = readInputStatus(1, 2);
System.out.println(“v021:” + v021);
System.out.println(“v022:” + v022);
System.out.println(“v023:” + v023);<span class="hljs-comment">// 03測試</span> Number v031 = readHoldingRegister(<span class="hljs-number">1</span>, <span class="hljs-number">1</span>, DataType.FOUR_BYTE_FLOAT);<span class="hljs-comment">// 注意,float</span> Number v032 = readHoldingRegister(<span class="hljs-number">1</span>, <span class="hljs-number">3</span>, DataType.FOUR_BYTE_FLOAT);<span class="hljs-comment">// 同上</span> System.out.println(<span class="hljs-string">"v031:"</span> + v031); System.out.println(<span class="hljs-string">"v032:"</span> + v032); <span class="hljs-comment">// 04測試</span> Number v041 = readInputRegisters(<span class="hljs-number">1</span>, <span class="hljs-number">0</span>, DataType.FOUR_BYTE_FLOAT);<span class="hljs-comment">//</span> Number v042 = readInputRegisters(<span class="hljs-number">1</span>, <span class="hljs-number">2</span>, DataType.FOUR_BYTE_FLOAT);<span class="hljs-comment">//</span> System.out.println(<span class="hljs-string">"v041:"</span> + v041); System.out.println(<span class="hljs-string">"v042:"</span> + v042); <span class="hljs-comment">// 批量讀取</span> batchRead();
} catch (Exception e) {
e.printStackTrace();
}
}
}
- 工廠。
代碼理解
slave配置
輸出信息
v011:true
v012:false
v013:true
v021:true
v022:false
v023:true
v031:7.5
v032:10.5
v041:1.5
v042:3.0
7.5
true
Java通過modbus4j對數據的寫入
原文鏈接:http://www.leftso.com/blog/83.html
類Modbus4jWriteUtils.java
package com.tcb.modbus;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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 com.serotonin.modbus4j.msg.ModbusResponse;
import com.serotonin.modbus4j.msg.WriteCoilRequest;
import com.serotonin.modbus4j.msg.WriteCoilResponse;
import com.serotonin.modbus4j.msg.WriteCoilsRequest;
import com.serotonin.modbus4j.msg.WriteCoilsResponse;
import com.serotonin.modbus4j.msg.WriteRegisterRequest;
import com.serotonin.modbus4j.msg.WriteRegisterResponse;
import com.serotonin.modbus4j.msg.WriteRegistersRequest;
/**
- modbus4j寫入數據
- @author xq
/
public class Modbus4jWriteUtils {
static Log log = LogFactory.getLog(Modbus4jWriteUtils.class);
/*
* 工廠。
*/
static ModbusFactory modbusFactory;
static {
if (modbusFactory == null) {
modbusFactory = new ModbusFactory();
}
}
<span class="hljs-comment">/**
* 獲取tcpMaster
*
* <span class="hljs-doctag">@return</span>
* <span class="hljs-doctag">@throws</span> ModbusInitException
*/</span>
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> ModbusMaster <span class="hljs-title">getMaster</span><span class="hljs-params">()</span> <span class="hljs-keyword">throws</span> ModbusInitException </span>{
IpParameters params = <span class="hljs-keyword">new</span> IpParameters();
params.setHost(<span class="hljs-string">"localhost"</span>);
params.setPort(<span class="hljs-number">502</span>);
ModbusMaster tcpMaster = modbusFactory.createTcpMaster(params, <span class="hljs-keyword">false</span>);
tcpMaster.init();
<span class="hljs-keyword">return</span> tcpMaster;
}
<span class="hljs-comment">/**
* 寫 [01 Coil Status(0x)]寫一個 function ID = 5
*
* <span class="hljs-doctag">@param</span> slaveId
* slave的ID
* <span class="hljs-doctag">@param</span> writeOffset
* 位置
* <span class="hljs-doctag">@param</span> writeValue
* 值
* <span class="hljs-doctag">@return</span> 是否寫入成功
* <span class="hljs-doctag">@throws</span> ModbusTransportException
* <span class="hljs-doctag">@throws</span> ModbusInitException
*/</span>
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">boolean</span> <span class="hljs-title">writeCoil</span><span class="hljs-params">(<span class="hljs-keyword">int</span> slaveId, <span class="hljs-keyword">int</span> writeOffset, <span class="hljs-keyword">boolean</span> writeValue)</span>
<span class="hljs-keyword">throws</span> ModbusTransportException, ModbusInitException </span>{
<span class="hljs-comment">// 獲取master</span>
ModbusMaster tcpMaster = getMaster();
<span class="hljs-comment">// 創建請求</span>
WriteCoilRequest request = <span class="hljs-keyword">new</span> WriteCoilRequest(slaveId, writeOffset, writeValue);
<span class="hljs-comment">// 發送請求並獲取響應對象</span>
WriteCoilResponse response = (WriteCoilResponse) tcpMaster.send(request);
<span class="hljs-keyword">if</span> (response.isException()) {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">false</span>;
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">true</span>;
}
}
<span class="hljs-comment">/**
* 寫[01 Coil Status(0x)] 寫多個 function ID = 15
*
* <span class="hljs-doctag">@param</span> slaveId
* slaveId
* <span class="hljs-doctag">@param</span> startOffset
* 開始位置
* <span class="hljs-doctag">@param</span> bdata
* 寫入的數據
* <span class="hljs-doctag">@return</span> 是否寫入成功
* <span class="hljs-doctag">@throws</span> ModbusTransportException
* <span class="hljs-doctag">@throws</span> ModbusInitException
*/</span>
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">boolean</span> <span class="hljs-title">writeCoils</span><span class="hljs-params">(<span class="hljs-keyword">int</span> slaveId, <span class="hljs-keyword">int</span> startOffset, <span class="hljs-keyword">boolean</span>[] bdata)</span>
<span class="hljs-keyword">throws</span> ModbusTransportException, ModbusInitException </span>{
<span class="hljs-comment">// 獲取master</span>
ModbusMaster tcpMaster = getMaster();
<span class="hljs-comment">// 創建請求</span>
WriteCoilsRequest request = <span class="hljs-keyword">new</span> WriteCoilsRequest(slaveId, startOffset, bdata);
<span class="hljs-comment">// 發送請求並獲取響應對象</span>
WriteCoilsResponse response = (WriteCoilsResponse) tcpMaster.send(request);
<span class="hljs-keyword">if</span> (response.isException()) {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">false</span>;
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">true</span>;
}
}
<span class="hljs-comment">/***
* 寫[03 Holding Register(4x)] 寫一個 function ID = 6
*
* <span class="hljs-doctag">@param</span> slaveId
* <span class="hljs-doctag">@param</span> writeOffset
* <span class="hljs-doctag">@param</span> writeValue
* <span class="hljs-doctag">@return</span>
* <span class="hljs-doctag">@throws</span> ModbusTransportException
* <span class="hljs-doctag">@throws</span> ModbusInitException
*/</span>
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">boolean</span> <span class="hljs-title">writeRegister</span><span class="hljs-params">(<span class="hljs-keyword">int</span> slaveId, <span class="hljs-keyword">int</span> writeOffset, <span class="hljs-keyword">short</span> writeValue)</span>
<span class="hljs-keyword">throws</span> ModbusTransportException, ModbusInitException </span>{
<span class="hljs-comment">// 獲取master</span>
ModbusMaster tcpMaster = getMaster();
<span class="hljs-comment">// 創建請求對象</span>
WriteRegisterRequest request = <span class="hljs-keyword">new</span> WriteRegisterRequest(slaveId, writeOffset, writeValue);
WriteRegisterResponse response = (WriteRegisterResponse) tcpMaster.send(request);
<span class="hljs-keyword">if</span> (response.isException()) {
log.error(response.getExceptionMessage());
<span class="hljs-keyword">return</span> <span class="hljs-keyword">false</span>;
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">true</span>;
}
}
<span class="hljs-comment">/**
*
* 寫入[03 Holding Register(4x)]寫多個 function ID=16
*
* <span class="hljs-doctag">@param</span> slaveId
* modbus的slaveID
* <span class="hljs-doctag">@param</span> startOffset
* 起始位置偏移量值
* <span class="hljs-doctag">@param</span> sdata
* 寫入的數據
* <span class="hljs-doctag">@return</span> 返回是否寫入成功
* <span class="hljs-doctag">@throws</span> ModbusTransportException
* <span class="hljs-doctag">@throws</span> ModbusInitException
*/</span>
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">boolean</span> <span class="hljs-title">writeRegisters</span><span class="hljs-params">(<span class="hljs-keyword">int</span> slaveId, <span class="hljs-keyword">int</span> startOffset, <span class="hljs-keyword">short</span>[] sdata)</span>
<span class="hljs-keyword">throws</span> ModbusTransportException, ModbusInitException </span>{
<span class="hljs-comment">// 獲取master</span>
ModbusMaster tcpMaster = getMaster();
<span class="hljs-comment">// 創建請求對象</span>
WriteRegistersRequest request = <span class="hljs-keyword">new</span> WriteRegistersRequest(slaveId, startOffset, sdata);
<span class="hljs-comment">// 發送請求並獲取響應對象</span>
ModbusResponse response = tcpMaster.send(request);
<span class="hljs-keyword">if</span> (response.isException()) {
log.error(response.getExceptionMessage());
<span class="hljs-keyword">return</span> <span class="hljs-keyword">false</span>;
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">true</span>;
}
}
<span class="hljs-comment">/**
* 寫入數字類型的模擬量(如:寫入Float類型的模擬量、Double類型模擬量、整數類型Short、Integer、Long)
*
* <span class="hljs-doctag">@param</span> slaveId
* <span class="hljs-doctag">@param</span> offset
* <span class="hljs-doctag">@param</span> value
* 寫入值,Number的子類,例如寫入Float浮點類型,Double雙精度類型,以及整型short,int,long
* <span class="hljs-doctag">@param</span> registerCount
* ,com.serotonin.modbus4j.code.DataType
* <span class="hljs-doctag">@throws</span> ModbusTransportException
* <span class="hljs-doctag">@throws</span> ErrorResponseException
* <span class="hljs-doctag">@throws</span> ModbusInitException
*/</span>
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title">writeHoldingRegister</span><span class="hljs-params">(<span class="hljs-keyword">int</span> slaveId, <span class="hljs-keyword">int</span> offset, Number value, <span class="hljs-keyword">int</span> dataType)</span>
<span class="hljs-keyword">throws</span> ModbusTransportException, ErrorResponseException, ModbusInitException </span>{
<span class="hljs-comment">// 獲取master</span>
ModbusMaster tcpMaster = getMaster();
<span class="hljs-comment">// 類型</span>
BaseLocator<Number> locator = BaseLocator.holdingRegister(slaveId, offset, dataType);
tcpMaster.setValue(locator, value);
}
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title">main</span><span class="hljs-params">(String[] args)</span> </span>{
<span class="hljs-keyword">try</span> {
<span class="hljs-comment">//@formatter:off</span>
<span class="hljs-comment">// 測試01</span>
// boolean t01 = writeCoil(1, 0, true);
// System.out.println(“T01:” + t01);
<span class="hljs-comment">// 測試02</span>
// boolean t02 = writeCoils(1, 0, new boolean[] { true, false, true });
// System.out.println(“T02:” + t02);
<span class="hljs-comment">// 測試03</span>
// short v = -3;
// boolean t03 = writeRegister(1, 0, v);
// System.out.println(“T03:” + t03);
// 測試04
// boolean t04 = writeRegisters(1, 0, new short[] { -3, 3, 9 });
// System.out.println(“t04:” + t04);
//寫模擬量
writeHoldingRegister(1,0, 10.1f, DataType.FOUR_BYTE_FLOAT);
<span class="hljs-comment">//@formatter:on</span>
} <span class="hljs-keyword">catch</span> (Exception e) {
e.printStackTrace();
}
}
}
代碼理解
使用modbus-master-tcp
原文鏈接:http://www.leftso.com/blog/310.html
modbus tcp通訊Java的方案之前已經講解過一種,modbus4j實現Java語言的modbus tcp協議通訊。從上一個方案中我們不難發現modbus4j的通訊實現方式是同步的。
實際應用中可能會讀取大量的數據。同步處理對於應用的響應還是不太友好的。
本博客主要講解另外一種Java語言的modbux tcp通訊方案。那就是modbus-master-tcp。
maven依賴
pom.xml注意,需要將java的編譯版本指定到1.8.因爲只有1.8以後才支持lambda表達式。
<dependency>
<groupId>com.digitalpetri.modbus</groupId>
<artifactId>modbus-master-tcp</artifactId>
<version>1.1.0</version>
</dependency>
觀察可以發現,modbus-master-tcp項目的底層是基於netty框架開發。天然的支持異步處理。在性能方面有很好的提升。
編寫modbus tcp讀取案例
類SimpleMasterExample
package com.tcb.modbusmastertcp;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import com.digitalpetri.modbus.codec.Modbus;
import com.digitalpetri.modbus.master.ModbusTcpMaster;
import com.digitalpetri.modbus.master.ModbusTcpMasterConfig;
import com.digitalpetri.modbus.requests.ReadCoilsRequest;
import com.digitalpetri.modbus.requests.ReadDiscreteInputsRequest;
import com.digitalpetri.modbus.requests.ReadHoldingRegistersRequest;
import com.digitalpetri.modbus.requests.ReadInputRegistersRequest;
import com.digitalpetri.modbus.responses.ReadCoilsResponse;
import com.digitalpetri.modbus.responses.ReadDiscreteInputsResponse;
import com.digitalpetri.modbus.responses.ReadHoldingRegistersResponse;
import com.digitalpetri.modbus.responses.ReadInputRegistersResponse;
import io.netty.buffer.ByteBuf;
import io.netty.util.ReferenceCountUtil;
/***
- modbus TCP協議Java通訊讀取例子
- @author xqlee
*/
public class SimpleMasterExample {
<span class="hljs-keyword">static</span> ModbusTcpMaster master;
<span class="hljs-comment">/**
* 獲取TCP協議的Master
*
* <span class="hljs-doctag">@return</span>
*/</span>
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title">initModbusTcpMaster</span><span class="hljs-params">()</span> </span>{
<span class="hljs-keyword">if</span> (master == <span class="hljs-keyword">null</span>) {
<span class="hljs-comment">// 創建配置</span>
ModbusTcpMasterConfig config = <span class="hljs-keyword">new</span> ModbusTcpMasterConfig.Builder(<span class="hljs-string">"localhost"</span>).setPort(<span class="hljs-number">502</span>).build();
master = <span class="hljs-keyword">new</span> ModbusTcpMaster(config);
}
}
<span class="hljs-comment">/***
* 釋放資源
*/</span>
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title">release</span><span class="hljs-params">()</span> </span>{
<span class="hljs-keyword">if</span> (master != <span class="hljs-keyword">null</span>) {
master.disconnect();
}
Modbus.releaseSharedResources();
}
<span class="hljs-comment">/**
* 讀取HoldingRegister數據
*
* <span class="hljs-doctag">@param</span> address
* 寄存器地址
* <span class="hljs-doctag">@param</span> quantity
* 寄存器數量
* <span class="hljs-doctag">@param</span> unitId
* id
* <span class="hljs-doctag">@return</span> 讀取結果
* <span class="hljs-doctag">@throws</span> InterruptedException
* 異常
* <span class="hljs-doctag">@throws</span> ExecutionException
* 異常
*/</span>
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> Number <span class="hljs-title">readHoldingRegisters</span><span class="hljs-params">(<span class="hljs-keyword">int</span> address, <span class="hljs-keyword">int</span> quantity, <span class="hljs-keyword">int</span> unitId)</span>
<span class="hljs-keyword">throws</span> InterruptedException, ExecutionException </span>{
Number result = <span class="hljs-keyword">null</span>;
CompletableFuture<ReadHoldingRegistersResponse> future = master
.sendRequest(<span class="hljs-keyword">new</span> ReadHoldingRegistersRequest(address, quantity), unitId);
ReadHoldingRegistersResponse readHoldingRegistersResponse = future.get();<span class="hljs-comment">// 工具類做的同步返回.實際使用推薦結合業務進行異步處理</span>
<span class="hljs-keyword">if</span> (readHoldingRegistersResponse != <span class="hljs-keyword">null</span>) {
ByteBuf buf = readHoldingRegistersResponse.getRegisters();
result = buf.readFloat();
ReferenceCountUtil.release(readHoldingRegistersResponse);
}
<span class="hljs-keyword">return</span> result;
}
<span class="hljs-comment">/**
* 讀取InputRegisters模擬量數據
*
* <span class="hljs-doctag">@param</span> address
* 寄存器開始地址
* <span class="hljs-doctag">@param</span> quantity
* 數量
* <span class="hljs-doctag">@param</span> unitId
* ID
* <span class="hljs-doctag">@return</span> 讀取值
* <span class="hljs-doctag">@throws</span> InterruptedException
* 異常
* <span class="hljs-doctag">@throws</span> ExecutionException
* 異常
*/</span>
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> Number <span class="hljs-title">readInputRegisters</span><span class="hljs-params">(<span class="hljs-keyword">int</span> address, <span class="hljs-keyword">int</span> quantity, <span class="hljs-keyword">int</span> unitId)</span>
<span class="hljs-keyword">throws</span> InterruptedException, ExecutionException </span>{
Number result = <span class="hljs-keyword">null</span>;
CompletableFuture<ReadInputRegistersResponse> future = master
.sendRequest(<span class="hljs-keyword">new</span> ReadInputRegistersRequest(address, quantity), unitId);
ReadInputRegistersResponse readInputRegistersResponse = future.get();<span class="hljs-comment">// 工具類做的同步返回.實際使用推薦結合業務進行異步處理</span>
<span class="hljs-keyword">if</span> (readInputRegistersResponse != <span class="hljs-keyword">null</span>) {
ByteBuf buf = readInputRegistersResponse.getRegisters();
result = buf.readFloat();
ReferenceCountUtil.release(readInputRegistersResponse);
}
<span class="hljs-keyword">return</span> result;
}
<span class="hljs-comment">/**
* 讀取Coils開關量
*
* <span class="hljs-doctag">@param</span> address
* 寄存器開始地址
* <span class="hljs-doctag">@param</span> quantity
* 數量
* <span class="hljs-doctag">@param</span> unitId
* ID
* <span class="hljs-doctag">@return</span> 讀取值
* <span class="hljs-doctag">@throws</span> InterruptedException
* 異常
* <span class="hljs-doctag">@throws</span> ExecutionException
* 異常
*/</span>
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> Boolean <span class="hljs-title">readCoils</span><span class="hljs-params">(<span class="hljs-keyword">int</span> address, <span class="hljs-keyword">int</span> quantity, <span class="hljs-keyword">int</span> unitId)</span>
<span class="hljs-keyword">throws</span> InterruptedException, ExecutionException </span>{
Boolean result = <span class="hljs-keyword">null</span>;
CompletableFuture<ReadCoilsResponse> future = master.sendRequest(<span class="hljs-keyword">new</span> ReadCoilsRequest(address, quantity),
unitId);
ReadCoilsResponse readCoilsResponse = future.get();<span class="hljs-comment">// 工具類做的同步返回.實際使用推薦結合業務進行異步處理</span>
<span class="hljs-keyword">if</span> (readCoilsResponse != <span class="hljs-keyword">null</span>) {
ByteBuf buf = readCoilsResponse.getCoilStatus();
result = buf.readBoolean();
ReferenceCountUtil.release(readCoilsResponse);
}
<span class="hljs-keyword">return</span> result;
}
<span class="hljs-comment">/**
* 讀取readDiscreteInputs開關量
*
* <span class="hljs-doctag">@param</span> address
* 寄存器開始地址
* <span class="hljs-doctag">@param</span> quantity
* 數量
* <span class="hljs-doctag">@param</span> unitId
* ID
* <span class="hljs-doctag">@return</span> 讀取值
* <span class="hljs-doctag">@throws</span> InterruptedException
* 異常
* <span class="hljs-doctag">@throws</span> ExecutionException
* 異常
*/</span>
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> Boolean <span class="hljs-title">readDiscreteInputs</span><span class="hljs-params">(<span class="hljs-keyword">int</span> address, <span class="hljs-keyword">int</span> quantity, <span class="hljs-keyword">int</span> unitId)</span>
<span class="hljs-keyword">throws</span> InterruptedException, ExecutionException </span>{
Boolean result = <span class="hljs-keyword">null</span>;
CompletableFuture<ReadDiscreteInputsResponse> future = master
.sendRequest(<span class="hljs-keyword">new</span> ReadDiscreteInputsRequest(address, quantity), unitId);
ReadDiscreteInputsResponse discreteInputsResponse = future.get();<span class="hljs-comment">// 工具類做的同步返回.實際使用推薦結合業務進行異步處理</span>
<span class="hljs-keyword">if</span> (discreteInputsResponse != <span class="hljs-keyword">null</span>) {
ByteBuf buf = discreteInputsResponse.getInputStatus();
result = buf.readBoolean();
ReferenceCountUtil.release(discreteInputsResponse);
}
<span class="hljs-keyword">return</span> result;
}
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title">main</span><span class="hljs-params">(String[] args)</span> </span>{
<span class="hljs-keyword">try</span> {
<span class="hljs-comment">// 初始化資源</span>
initModbusTcpMaster();
<span class="hljs-comment">// 執行操作</span>
<span class="hljs-comment">// 讀取模擬量</span>
System.out.println(readHoldingRegisters(<span class="hljs-number">0</span>, <span class="hljs-number">4</span>, <span class="hljs-number">1</span>));
System.out.println(readInputRegisters(<span class="hljs-number">0</span>, <span class="hljs-number">4</span>, <span class="hljs-number">1</span>));
<span class="hljs-comment">// 讀取開關量</span>
System.out.println(readCoils(<span class="hljs-number">0</span>, <span class="hljs-number">1</span>, <span class="hljs-number">1</span>));
System.out.println(readDiscreteInputs(<span class="hljs-number">0</span>, <span class="hljs-number">1</span>, <span class="hljs-number">1</span>));
System.out.println(readDiscreteInputs(<span class="hljs-number">2</span>, <span class="hljs-number">1</span>, <span class="hljs-number">1</span>));
<span class="hljs-comment">// 釋放資源</span>
release();
} <span class="hljs-keyword">catch</span> (Exception e) {
e.printStackTrace();
}
}
}
代碼理解
slave:和上面的一樣
輸出信息
2.5039635
1.5
true
true
true
評價感受
- jlibmodbus:集成多個串口通信開源庫,有意思
- modbus4j:很有名
- modbus-master-tcp:底層netty,支持異步
- Jamod:Github上安卓開發modbus通信用的多