// на стороне контроллера

public void WriteOPCDouble(string tagName, string base64FloatBytes)

        {

            byte[] bytes = Convert.FromBase64String(base64FloatBytes);

            double value = BitConverter.ToDouble(bytes, 0);

​

            const string serverUrl = "opcda://localhost/KEPware.KEPServerEx.V6";

            TsCDaServer myDaServer = new TsCDaServer();

            myDaServer.Connect(serverUrl);

​

            TsCDaItemValue[] WriteItem = new TsCDaItemValue[1];

            WriteItem[0] = new TsCDaItemValue();

            WriteItem[0].ItemName = tagName;

            WriteItem[0].ServerHandle = myDaServer;

            WriteItem[0].Value = value;

            OpcItemResult[] res = myDaServer.Write(WriteItem);

​

            myDaServer.Disconnect();

​

​

        }

​

​

// на стороне FRX

​

            double value = 456.654;

            string urlParams = "http://localhost:52555/Home/WriteOPCDouble?tagName=Channel2.Device1.Tag1&base64FloatBytes=" + Convert.ToBase64String(BitConverter.GetBytes(value));

            using (Stream stream = new WebClient().OpenRead(urlParams))

            {

            }

​