用JAVA写一个modbus rtu通讯的案例
时间: 2023-05-10 07:55:30 浏览: 685
可以使用Java Modbus Library来实现Modbus RTU通讯。以下是一个简单的示例代码:
```java
import com.serotonin.modbus4j.ModbusFactory;
import com.serotonin.modbus4j.ModbusMaster;
import com.serotonin.modbus4j.exception.ModbusInitException;
import com.serotonin.modbus4j.exception.ModbusTransportException;
import com.serotonin.modbus4j.locator.BaseLocator;
import com.serotonin.modbus4j.msg.ReadInputRegistersRequest;
import com.serotonin.modbus4j.msg.ReadInputRegistersResponse;
public class ModbusRtuExample {
public static void main(String[] args) {
ModbusFactory modbusFactory = new ModbusFactory();
ModbusMaster modbusMaster = modbusFactory.createRtuMaster("COM1", 9600, 8, 1, 0);
try {
modbusMaster.init();
ReadInputRegistersRequest request = new ReadInputRegistersRequest(1, 0, 10);
ReadInputRegistersResponse response = (ReadInputRegistersResponse) modbusMaster.send(request, 1);
int[] values = response.getShortData();
for (int value : values) {
System.out.println(value);
}
} catch (ModbusInitException | ModbusTransportException e) {
e.printStackTrace();
} finally {
modbusMaster.destroy();
}
}
}
```
这个示例代码使用了Modbus4J库来实现Modbus RTU通讯。它连接了一个COM1串口,读取了从地址1开始的10个寄存器的值,并将它们打印到控制台上。
请注意,这个示例代码仅供参考,实际应用中需要根据具体的设备和通讯协议进行修改。
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