Java通过j2mod库实现的Modbus TCP协议取值

原创已于 2024-04-26 16:34:44 修改 · 1.1k 阅读

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#java #服务器 #时序数据库

于 2024-04-26 16:12:58 首次发布

文章介绍了如何在Java项目中通过`j2mod`库实现ModbusTCP协议，展示了一个主设备读取保持寄存器、输入寄存器、离散输入和线圈的状态的示例。

pom

<dependency>
    <groupId>com.ghgande</groupId>
    <artifactId>j2mod</artifactId>
    <version>LATEST</version>
</dependency>

代码

  public static void main(String[] args) {

        String serverAddress = "127.0.0.1";
        int serverPort = 505;
        try {
            ModbusTCPMaster modbusTCPMaster = new ModbusTCPMaster(serverAddress, serverPort);
            modbusTCPMaster.connect();
            Register[] h = modbusTCPMaster.readMultipleRegisters(1, 0, 2);//保持
            for (Register register : h) {
                System.out.println("保持"+register.getValue());
            }
            InputRegister[] inputRegisters = modbusTCPMaster.readInputRegisters(1, 0, 2);//输入
            for (InputRegister inputRegister : inputRegisters) {
                System.out.println("输入"+inputRegister.getValue());
            }
            BitVector inputDiscrete = modbusTCPMaster.readInputDiscretes(1, 0, 2);//离散
            for (int i = 0; i < inputDiscrete.size(); i++) {
                boolean value = inputDiscrete.getBit(i);
                System.out.println("离散"+value);
            }
            BitVector coils = modbusTCPMaster.readCoils(1, 0, 2);//线圈
            for (int i = 0; i < coils.size(); i++) {
                boolean value = coils.getBit(i);
                System.out.println("线圈"+value);
            }
            modbusTCPMaster.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }