public TKSY.Types.OPC.Tag_Info_Tag  WriteTagValue(string tagName, object value)
        {
            try
            {
                if (_OPCActive == false)
                    return new TKSY.Types.OPC.Tag_Info_Tag();
 
                TAG_Info item = _TagInfoList.Find(x => x.TAG.TAGFullName.Equals(tagName));
 
                if (item != null)
                {
                    if (item.TAG.VtgValue == null)
                        item.TAG.VtgValue = new DAVtq(value);
 
                    item.TAG.VtgValue.Value = value;
                    if (item.TAG.IsArray == true)
                    {
                        // check data length of writting array. If not the same length, then Write() will cause an exception
                        if (item.TAG.ArrayLength != ((Array)value).GetUpperBound(0) + 1)
                        {
                            if (OnLoggingHandler != null)
                                OnLoggingHandler(this, new LoggingArgs(LogLevel.Error, string.Format("Tag write -> tag=<{0}> OPC array length=<{1}>, writing data length=<{2}>", tagName, item.TAG.ArrayLength, ((Array)value).GetLowerBound(0))));
 
                            return null;
                        }
                    }
 
                    _easyDaClient.WriteItemValue(_ServerAdress, _ServerClass, tagName, value);
 
                    if (OnLoggingHandler != null)
                        OnLoggingHandler(this, new LoggingArgs(LogLevel.OPC, string.Format("Tag write -> tag=<{0}>, Value=<{1}>", tagName, OPCTypeConverter.GetStringValueFromArray(item.TAG))));
 
                    return item.TAG;
                }
                else
                {
                    if (OnLoggingHandler != null)
                        OnLoggingHandler(this, new LoggingArgs(LogLevel.OPC, string.Format("Tag write -> tag=<{0}> unkown / not find in internal list.", tagName)));
                }
            }
            catch (OpcException oex)
            {
                if (OnLoggingHandler != null)
                    OnLoggingHandler(this, new LoggingArgs(LogLevel.Exception, string.Format("Error during OPC WriteItemValue tag=<{0}>, value=<{1}>", tagName, value), oex, ExceptionType.OpcException));
            }
            catch (Exception ex)
            {
                if (OnLoggingHandler != null)
                    OnLoggingHandler(this, new LoggingArgs(LogLevel.Exception, string.Format("Error during OPC WriteItemValue tag=<{0}>, value=<{1}>", tagName, value), ex, ExceptionType.Exception));
            }
            return null;
        }