public const byte ModbusDevAddr = 1;
        public const byte ModbusMaxRegXCHG = 123;
        public const ushort defaultExchangePort = 8080;
        public const String defaultIPAddress = "192.168.5.2";


        static private ushort[] fnModBusRead(byte slaveAddress, ushort startReg, ushort numberofPoints)
        {
            ushort[] resultArray = new ushort[numberofPoints];

            try
            {
                //System.Net.IPEndPoint TargetEndPoint = new System.Net.IPEndPoint(0, 32567);
                //TargetEndPoint.Address = new System.Net.IPAddress(new byte[] { 192, 168, 5, 111 });               
                using (System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient())
                //using (System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient(TargetEndPoint))
                {
                    client.Connect(new System.Net.IPEndPoint(System.Net.IPAddress.Parse(defaultIPAddress), defaultExchangePort));                  
                    Modbus.Device.ModbusIpMaster master = Modbus.Device.ModbusIpMaster.CreateIp(client);

                    ushort messageCount = (ushort)(numberofPoints / ModbusMaxRegXCHG);
                    byte messageRest = (byte)(numberofPoints % ModbusMaxRegXCHG);

                    ushort i;
                    for (i = 0; i < messageCount; i++)
                    {
                        ushort[] receiveArray = new ushort[ModbusMaxRegXCHG];
                        receiveArray = master.ReadHoldingRegisters(ModbusDevAddr, (ushort)(startReg + i * ModbusMaxRegXCHG), ModbusMaxRegXCHG);
                        Array.Copy(receiveArray, 0, resultArray, (ushort)(i * ModbusMaxRegXCHG), ModbusMaxRegXCHG);
                    }
                    if (messageRest > 0)
                    {
                        ushort[] receiveArray = new ushort[messageRest];
                        receiveArray = master.ReadHoldingRegisters(ModbusDevAddr, (ushort)(startReg + i * ModbusMaxRegXCHG), messageRest);
                        Array.Copy(receiveArray, 0, resultArray, (ushort)(i * ModbusMaxRegXCHG), messageRest);
                    }
                }
            }
            catch (SystemException e)
            {
                System.Console.WriteLine("Ошибка: " + e.Message);                

            }            
            return resultArray;
        }

client.Connect(new System.Net.IPEndPoint(System.Net.IPAddress.Parse(defaultIPAddress), defaultExchangePort));

receiveArray = master.ReadHoldingRegisters(ModbusDevAddr, (ushort)(startReg + i * ModbusMaxRegXCHG), ModbusMaxRegXCHG);

receiveArray = master.ReadHoldingRegisters(ModbusDevAddr, (ushort)(startReg + i * ModbusMaxRegXCHG), messageRest);