Modbus RTU:——传输的是字节数组（bit[]）
通信：读写
输出：可以读写
输入：只能读
存储区：输出线圈、输入线圈、输出寄存器、输入寄存器
存储区范围：5位和6位
功能代码
验证4个常用功能码，仿真软件上面有F=01，F=02，F=03和F=04来显示
0x01：读线圈
0x02：读离散量输入
0x03：读保持寄存器
0x04：读输入寄存器
测试使用Modbus Slave（下载） 模拟
saveid：看资料"从站在modbus总线上可以有多个"，仿真软件就能模拟一个从站，就是ID=1，当然可以修改成ID=2
功能码：4个功能码，对应写4个方法，，仿真软件上的F=1，或者F=2，3，4
addr：一开始看代码4个方法addr都是从0开始，是否重复？答案是：4个功能码表示4个区域或者设备，addr表示各自区域的地址编号。
阿里云不能直接下载
<!-- 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>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13-beta-3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.infiniteautomation</groupId>
<artifactId>modbus4j</artifactId>
<version>3.0.3</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.9</version>
</dependency>
</dependencies>
public class TestModbus {
public static void main(String[] args) throws UnknownHostException {
// 设置主机TCP参数
TcpParameters tcpParameters = new TcpParameters();
// 设置TCP的ip地址
InetAddress address = InetAddress.getByName("127.0.0.1");
// TCP参数设置ip地址
tcpParameters.setHost(address);
// TCP设置长连接
tcpParameters.setKeepAlive(true);
// TCP设置端口，这里设置是默认端口502
tcpParameters.setPort(Modbus.TCP_PORT);
// 创建一个主机
ModbusMaster master = ModbusMasterFactory.createModbusMasterTCP(tcpParameters);
Modbus.setAutoIncrementTransactionId(true);
int slaveId = 1;//从机地址
int offset = 0;//寄存器读取开始地址
int quantity = 10;//读取的寄存器数量
try {
if (!master.isConnected()){
master.connect(); //开启连接
}
// 读取对应从机的数据，readInputRegisters读取的写寄存器，功能码04
int[] registerValues4 = master.readInputRegisters(slaveId,offset,quantity);
for (int value : registerValues4){
System.out.println("Address："+offset++ +"，Value："+value);
}
}catch (Exception e){
e.printStackTrace();
}finally {
try {
master.disconnect();
} catch (ModbusIOException e) {
e.printStackTrace();
}
}
}
}
public class Modbus4jReadUtils {
static ModbusFactory modbusFactory;
static {
if (modbusFactory == null){
modbusFactory = new ModbusFactory();
}
}
/***
* 初始化连接
* @return ModbusMaster
*/
public static ModbusMaster getMaster() throws ModbusInitException{
IpParameters params = new IpParameters();
params.setHost("localhost");
params.setPort(502);
// modbusFactory.createRtuMaster(wapper); //RTU 协议
// modbusFactory.createUdpMaster(params);//UDP 协议
// modbusFactory.createAsciiMaster(wrapper);//ASCII 协议
// ModbusMaster master = modbusFactory.crea
ModbusMaster master = modbusFactory.createTcpMaster(params,false);
master.init();
return master;
}
/***
* 读取[01 Coil Status 0x]类型 开关数据
* @author zhengfuping
* @param slaveId 从站编号
* @param offset 偏移位置
* @return Boolean
*/
public static Boolean readCoilStatus(int slaveId,int offset) throws ModbusInitException, ErrorResponseException, ModbusTransportException {
BaseLocator<Boolean> loc = BaseLocator.coilStatus(slaveId,offset);
Boolean value = getMaster().getValue(loc);
return value;
}
/**
* 读取[02 Input Status 1x]类型 开关数据
*
* @param slaveId 从站编号
* @param offset 偏移位
* @return
*/
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;
}
/**
* 读取[03 Holding Register类型 2x]模拟量数据
* @param slaveId
* @param offset 位置
* @param dataType 数据类型,来自com.serotonin.modbus4j.code.DataType
*/
public static Number readHoldingRegister(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 = getMaster().getValue(loc);
return value;
}
/**
* 读取[04 Input Registers 3x]类型 模拟量数据
*/
public static Number readInputRegisters(int slaveId, int offset, int dataType)
throws ModbusTransportException, ErrorResponseException, ModbusInitException {
// 04 Input Registers类型数据读取
BaseLocator<Number> loc = BaseLocator.inputRegister(slaveId, offset, dataType);
Number value = getMaster().getValue(loc);
return value;
}
// 批量读取
public static void batchRead(Integer count) throws ModbusInitException, ErrorResponseException, ModbusTransportException {
BatchRead<Integer> batch = new BatchRead<Integer>();
for (int i = 0; i <= count; i++) {
batch.addLocator(i,BaseLocator.holdingRegister(1,i, DataType.TWO_BYTE_INT_SIGNED));
}
ModbusMaster master =getMaster();
batch.setContiguousRequests(false);
BatchResults<Integer> results = master.send(batch);
for (int i = 0; i <= count; i++) {
System.err.println(results.getValue(i));
}
}
public static void main(String[] args) {
try {
// 01测试
Boolean v011 = readCoilStatus(1,1);
Boolean v012 = readCoilStatus(1,2);
Boolean v013 = readCoilStatus(1,3);
System.out.println("v011:" + v011);
System.out.println("v012:" + v012);
System.out.println("v013:" + v013);
// 02测试
Boolean v021 = readInputStatus(1, 1);
Boolean v022 = readInputStatus(1, 2);
Boolean v023 = readInputStatus(1, 3);
System.out.println("v021:" + v021);
System.out.println("v022:" + v022);
System.out.println("v023:" + v023);
// 03测试
Number v031 = readHoldingRegister(1, 1, DataType.TWO_BYTE_INT_SIGNED);//signed
Number v032 = readHoldingRegister(1, 2, DataType.TWO_BYTE_INT_SIGNED);// 同上
System.out.println("v031:" + v031);
System.out.println("v032:" + v032);
// 04测试
Number v041 = readInputRegisters(1, 1, DataType.TWO_BYTE_INT_SIGNED);//
Number v042 = readInputRegisters(1, 2, DataType.TWO_BYTE_INT_SIGNED);//
System.out.println("v041:" + v041);
System.out.println("v042:" + v042);
// 批量读取
batchRead(9);
} catch (Exception e) {
e.printStackTrace();
}
}
}
读取结果:
public class Modbus4jWriteUtils {
static Log log = LogFactory.getLog(Modbus4jWriteUtils.class);
/**
* 工厂。
*/
static ModbusFactory modbusFactory;
static {
if (modbusFactory == null) {
modbusFactory = new ModbusFactory();
}
}
/**
* 获取tcpMaster
*
* @return
* @throws ModbusInitException
*/
public static ModbusMaster getMaster() throws ModbusInitException {
IpParameters params = new IpParameters();
params.setHost("localhost");
params.setPort(502);
ModbusMaster tcpMaster = modbusFactory.createTcpMaster(params, false);
tcpMaster.init();
return tcpMaster;
}
/**
* 写 [01 Coil Status(0x)]写一个 function ID = 5
* @param slaveId slave的ID
* @param writeOffset 位置
* @param writeValue 值
*/
public static boolean writeCoil(int slaveId, int writeOffset, boolean writeValue)
throws ModbusTransportException, ModbusInitException {
// 获取master
ModbusMaster tcpMaster = getMaster();
// 创建请求
WriteCoilRequest request = new WriteCoilRequest(slaveId, writeOffset, writeValue);
// 发送请求并获取响应对象
WriteCoilResponse response = (WriteCoilResponse) tcpMaster.send(request);
if (response.isException()) {
return false;
} else {
return true;
}
}
/**
* 写[01 Coil Status(0x)] 写多个 function ID = 15
* @param slaveId
* @param startOffset 开始位置
* @param bdata 写入的数据
* @return 是否写入成功
*/
public static boolean writeCoils(int slaveId, int startOffset, boolean[] bdata)
throws ModbusTransportException, ModbusInitException {
// 获取master
ModbusMaster tcpMaster = getMaster();
// 创建请求
WriteCoilsRequest request = new WriteCoilsRequest(slaveId, startOffset, bdata);
// 发送请求并获取响应对象
WriteCoilsResponse response = (WriteCoilsResponse) tcpMaster.send(request);
if (response.isException()) {
return false;
} else {
return true;
}
}
/***
* 写[03 Holding Register(4x)] 写一个 function ID = 6
* @param slaveId
* @param writeOffset
* @param writeValue
*/
public static boolean writeRegister(int slaveId, int writeOffset, short writeValue)
throws ModbusTransportException, ModbusInitException {
// 获取master
ModbusMaster tcpMaster = getMaster();
// 创建请求对象
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;
}
}
/**
*
* 写入[03 Holding Register(4x)]写多个 function ID=16
* @param slaveId
* @param startOffset 起始位置偏移量值
* @param sdata 写入的数据
*/
public static boolean writeRegisters(int slaveId, int startOffset, short[] sdata)
throws ModbusTransportException, ModbusInitException {
// 获取master
ModbusMaster tcpMaster = getMaster();
// 创建请求对象
WriteRegistersRequest request = new WriteRegistersRequest(slaveId, startOffset, sdata);
// 发送请求并获取响应对象
ModbusResponse response = tcpMaster.send(request);
if (response.isException()) {
log.error(response.getExceptionMessage());
return false;
} else {
return true;
}
}
/**
* 写入数字类型的模拟量（如:写入Float类型的模拟量、Double类型模拟量、整数类型Short、Integer、Long）
*
* @param slaveId
* @param offset
* @param value 写入值,Number的子类,例如写入Float浮点类型,Double双精度类型,以及整型short,int,long
* @param dataType com.serotonin.modbus4j.code.DataType
*/
public static void writeHoldingRegister(int slaveId, int offset, Number value, int dataType)
throws ModbusTransportException, ErrorResponseException, ModbusInitException {
// 获取master
ModbusMaster tcpMaster = getMaster();
// 类型
BaseLocator<Number> locator = BaseLocator.holdingRegister(slaveId, offset, dataType);
tcpMaster.setValue(locator, value);
}
public static void main(String[] args) {
try {
// 测试01 单个写入(0x)
boolean t01 = writeCoil(1, 0, true);
System.out.println("T01:" + t01);
// 测试02 批量写入(0x)
boolean t02 = writeCoils(1, 0, new boolean[] { true, false, true });
System.out.println("T02:" + t02);
// 测试03 单个写入(4x)
short v = -3;
boolean t03 = writeRegister(1, 0, v);
System.out.println("T03:" + t03);
// 测试04 批量写入(4x)
boolean t04 = writeRegisters(1, 0, new short[] { -309, 390, 91 });
System.out.println("t04:" + t04);
//写模拟量
writeHoldingRegister(1,8, 100, DataType.TWO_BYTE_INT_SIGNED);
} catch (Exception e) {
e.printStackTrace();
}
}
}