diff --git a/SCADA/Example/BatchCoreTest.exe b/SCADA/Example/BatchCoreTest.exe
index 9541609..5db20b6 100644
Binary files a/SCADA/Example/BatchCoreTest.exe and b/SCADA/Example/BatchCoreTest.exe differ
diff --git a/SCADA/Example/ClientDriver.dll b/SCADA/Example/ClientDriver.dll
index f6b4367..7c19f2f 100644
Binary files a/SCADA/Example/ClientDriver.dll and b/SCADA/Example/ClientDriver.dll differ
diff --git a/SCADA/Example/DataService.dll b/SCADA/Example/DataService.dll
index a7ecac4..ee2dbac 100644
Binary files a/SCADA/Example/DataService.dll and b/SCADA/Example/DataService.dll differ
diff --git a/SCADA/Program/.vs/DataExchange/v15/.suo b/SCADA/Program/.vs/DataExchange/v15/.suo
index a1476ec..24b83e9 100644
Binary files a/SCADA/Program/.vs/DataExchange/v15/.suo and b/SCADA/Program/.vs/DataExchange/v15/.suo differ
diff --git a/SCADA/Program/.vs/DataExchange/v15/Server/sqlite3/storage.ide b/SCADA/Program/.vs/DataExchange/v15/Server/sqlite3/storage.ide
index 311a1dd..6c06d68 100644
Binary files a/SCADA/Program/.vs/DataExchange/v15/Server/sqlite3/storage.ide and b/SCADA/Program/.vs/DataExchange/v15/Server/sqlite3/storage.ide differ
diff --git a/SCADA/Program/.vs/DataExchange/v15/sqlite3/storage.ide b/SCADA/Program/.vs/DataExchange/v15/sqlite3/storage.ide
index 9a9a7a2..51b8c5a 100644
Binary files a/SCADA/Program/.vs/DataExchange/v15/sqlite3/storage.ide and b/SCADA/Program/.vs/DataExchange/v15/sqlite3/storage.ide differ
diff --git a/SCADA/Program/DataService/PLCGroup.cs b/SCADA/Program/DataService/PLCGroup.cs
index f063910..6d3c26a 100644
--- a/SCADA/Program/DataService/PLCGroup.cs
+++ b/SCADA/Program/DataService/PLCGroup.cs
@@ -983,7 +983,7 @@ namespace DataService
                                 {
                                     for (int i = 0; i < addr.DataSize / 2; i++)
                                     {
-                                        prcv[iShort1] = IPAddress.HostToNetworkOrder(prcv[iShort1]);
+                                        prcv[iShort1 + i] = IPAddress.HostToNetworkOrder(prcv[iShort1 + i]);
                                     }
                                 }
                                 if (addr.DataSize <= 2)
diff --git a/SCADA/Program/ModbusDriver/ModbusRTUDriver.cs b/SCADA/Program/ModbusDriver/ModbusRTUDriver.cs
index 74b85fa..86f807e 100644
--- a/SCADA/Program/ModbusDriver/ModbusRTUDriver.cs
+++ b/SCADA/Program/ModbusDriver/ModbusRTUDriver.cs
@@ -478,7 +478,7 @@ namespace ModbusDriver
                  CreateReadHeader(address.Area, address.Start, size, func);
                 lock (_async)
                 {
-                    byte[] frameBytes = new byte[size * 2 + 3];//size * 2 +
+                    byte[] frameBytes = new byte[size * 2 + 5];//size * 2 +
                     byte[] data = new byte[size * 2];
                     _serialPort.Write(header, 0, header.Length);
                     int numBytesRead = 0;
@@ -486,12 +486,15 @@ namespace ModbusDriver
                         numBytesRead += _serialPort.Read(frameBytes, numBytesRead, 2 - numBytesRead);
                     if (frameBytes[1] == address.DBNumber)
                     {
-                        numBytesRead = 0;
-                        while (numBytesRead != frameBytes.Length)
+                        while (numBytesRead < frameBytes.Length)
                             numBytesRead += _serialPort.Read(frameBytes, numBytesRead, frameBytes.Length - numBytesRead);
-                        Array.Copy(frameBytes, 1, data, 0, data.Length);
-                        Thread.Sleep(20);
-                        return data;
+                        if (Utility.CheckSumCRC(frameBytes))
+                        {
+                            Array.Copy(frameBytes, 3, data, 0, data.Length);
+                            Thread.Sleep(20);
+                            return data;
+                        }
+                        else Thread.Sleep(10);
                     }
                     else
                     {
diff --git a/SCADA/dll/DataService.dll b/SCADA/dll/DataService.dll
index 2f85d69..c78f7d8 100644
Binary files a/SCADA/dll/DataService.dll and b/SCADA/dll/DataService.dll differ
diff --git a/SCADA/dll/ModbusDriver.dll b/SCADA/dll/ModbusDriver.dll
index 86ef899..f0882e6 100644
Binary files a/SCADA/dll/ModbusDriver.dll and b/SCADA/dll/ModbusDriver.dll differ
diff --git a/SCADA/dll/OPCDriver.dll b/SCADA/dll/OPCDriver.dll
index 1b9223e..ea38597 100644
Binary files a/SCADA/dll/OPCDriver.dll and b/SCADA/dll/OPCDriver.dll differ
diff --git a/SCADA/dll/SiemensPLCDriver.dll b/SCADA/dll/SiemensPLCDriver.dll
index 72d1532..53aaab1 100644
Binary files a/SCADA/dll/SiemensPLCDriver.dll and b/SCADA/dll/SiemensPLCDriver.dll differ