Read timed ou

[Anonymous]

I began to study the Modbus protocol. I try to use it for connection, but I get a connection time error. Tell me where I could make a mistake. Thank you.

ModbusClient modbusClient = new ModbusClient("192.168.127.12", 502);
        try {
            modbusClient.Connect("192.168.127.12", 4001);
            System.out.println("Connected " + modbusClient.isConnected());
            System.out.println("Ip " + modbusClient.getipAddress());
            System.out.println("Port " + modbusClient.getPort());
            System.out.println("UnitIdentifier " + modbusClient.getUnitIdentifier());
            System.out.println("UDPFlag " + modbusClient.getUDPFlag());
            System.out.println("SerialFlag " + modbusClient.getSerialFlag());
            System.out.println("Connect timeout " + modbusClient.getConnectionTimeout());

            System.out.println(modbusClient.ReadHoldingRegisters(0x600, 16));
        }
        catch (Exception e) {
            e.printStackTrace();
        }

An error appears when I try to read: java.net.SocketTimeoutException: Read timed out.
Maybe I'm not correctly addressing the data address on the device. For example, there is: address and HEX 600, data type is WORD array, access to it for reading and size is 16 bytes.
In the code, I use the function and specify the address and size, after execution, an error occurs: Read timed out. Maybe someone can explain to me where I have a mistake.

System.out.println(modbusClient.ReadHoldingRegisters(0x600, 16));

[Rossmann Engineering]

You are trying to connect to a server listening to Port 4001. As that really intended? Usually a Modbus Server opens port 502.

[Aleksey Malashenkov]

[Anonymous]

Hi, This is Satish, Wanted to check if latest ModbusClient.java file is the one which is using jssc.jar for serial port communication or is it rtrx.jar ?

[Rossmann Engineering]

Hi Satih, it is using RXTX.