java modbus-tcp 根据寄存器种类获取数据，demo

以下是一个简单的Java Modbus-TCP示例，根据寄存器类型获取数据：

import java.net.InetAddress;
import com.serotonin.modbus4j.*;
import com.serotonin.modbus4j.exception.ModbusTransportException;

public class ModbusTCPExample {

    public static void main(String[] args) throws Exception {
        // Define the Modbus TCP connection parameters
        InetAddress inetAddress = InetAddress.getByName("localhost");
        int port = 502;

        // Create the Modbus master
        ModbusMaster master = ModbusUtil.createModbusMasterTCP(inetAddress, port);

        // Define the slave ID and the starting address of the registers to read
        int slaveId = 1;
        int startAddress = 0;

        // Define the number of registers to read
        int numRegisters = 10;

        // Define the type of register to read (holding, input, coil, or discrete)
        RegisterRange registerRange = RegisterRange.HOLDING_REGISTER;

        // Read the registers and print the values
        try {
            // Read the registers
            ReadResponse response = master.readInputRegisters(slaveId, startAddress, numRegisters, registerRange);

            // Print the register values
            for (int i = 0; i < numRegisters; i++) {
                System.out.println("Register " + (startAddress + i) + " = " + response.getShortData()[i]);
            }
        } catch (ModbusTransportException ex) {
            System.out.println("Modbus exception: " + ex.getMessage());
        } finally {
            // Close the Modbus master
            master.disconnect();
        }
    }
}

在示例中，我们首先定义了Modbus TCP连接参数，包括IP地址和端口号。然后，我们创建Modbus主机，并定义要读取的寄存器的起始地址、数量和类型。最后，我们从Modbus主机读取寄存器的值，并将其打印到控制台上。