Exemple #1
0
 public override bool Write(plcdb_lib.Models.Model.TagsRow t, object val)
 {
     try
     {
         if (!ActiveTags.Select(p => p.TagRow).Contains(t))
         {
             AddTagToGroup(t);
         }
         OpcTag ToWrite = ActiveTags.First(p => p.TagRow.PK == t.PK);
         TagGroup.SyncWriteItems(new int[] { ToWrite.ServerId }, new object[] { val });
         return(true);
     }
     catch (Exception ex)
     {
         throw new Exception("Error writing tag '" + t + "' from OPC server: " + ControllerInfo.Address + "\\" + ControllerInfo.opc_server, ex);
     }
 }
Exemple #2
0
        private void AddTagToGroup(Model.TagsRow tag)
        {
            try
            {
                if (TagGroup == null)
                {
                    String OpcName = "plcdb-" + ControllerInfo.PK;
                    TagGroup = Server.AddGroup(Interlocked.Increment(ref GroupClientId), OpcName, true, 100, (float)0.0);
                }
                OpcTag NewTag = new OpcTag();
                NewTag.TagRow = tag;
                NewTag.Item   = new Item()
                {
                    //AccessPath = TagRow.Address,
                    Active            = true,
                    ClientId          = (int)tag.PK,
                    ItemId            = tag.Address,
                    RequestedDataType = VarEnum.VT_EMPTY// TagRow.IsDataTypeNull() ? VarEnum.VT_UNKNOWN : TypeToOpcType(TagRow.DataType)
                };
                NewTag.ItemValue = new ItemValue();

                var TagResult = TagGroup.AddItems(new Item[] { NewTag.Item }).First();
                NewTag.ItemResult = TagResult;

                ActiveTags.Add(NewTag);
                //add event handler -- make sure we are not adding a duplicate copy
                TagGroup.ReadComplete -= TagGroup_ReadComplete;
                TagGroup.DataChange   -= TagGroup_ReadComplete;
                TagGroup.ReadComplete += TagGroup_ReadComplete;
                TagGroup.DataChange   += TagGroup_ReadComplete;
            }
            catch (Exception ex)
            {
                throw new Exception("Error adding tag '" + tag + "' to group on OPC server: " + ControllerInfo.Address + "\\" + ControllerInfo.opc_server, ex);
            }
        }