protected override CommonDataContract.PollItemValue[] Poll()
{
if (_coreOpcServer.isConnectedDA) {
OPCDA.NET.SyncIOGroup group = new OPCDA.NET.SyncIOGroup(_coreOpcServer);
OPCDA.NET.OPCItemState opcItemState;
List<CommonDataContract.PollItemValue> pollItemValues = new List<CommonDataContract.PollItemValue>();
OPCDataContract.OPCItemValue newOpctemValue;
int iRes;
foreach (var itemName in _opcItemNames) {
try {
iRes = group.Read(OPCDA.OPCDATASOURCE.OPC_DS_CACHE, itemName, out opcItemState);
newOpctemValue = new OPCItemValue();
newOpctemValue.ItemID = itemName;
newOpctemValue.Value = opcItemState.DataValue;
newOpctemValue.Timestamp = DateTime.Now;
newOpctemValue.ClientHandle = opcItemState.HandleClient;
newOpctemValue.Error = opcItemState.Error;
newOpctemValue.QualityCode = opcItemState.Quality;
pollItemValues.Add(newOpctemValue);
}
catch (Exception ex) {
TDInternalLogger.GetLogger().LogException(new Exception("TDOpcV2PollProcess.Poll()", ex));
}
}
return pollItemValues.ToArray();
}
else {
TDInternalLogger.GetLogger().Log("TDOpcV2PollProcess.Poll()", "DA Server not connected");
return new CommonDataContract.PollItemValue[0];
}
}
protected CommonDataContract.PollItemValue[] ConvertToPollItemValues(OPCDA.NET.ItemValue[] values)
{
List<CommonDataContract.PollItemValue> result = new List<CommonDataContract.PollItemValue>();
OPCDataContract.OPCItemValue newItemValue;
foreach (var currentOPCItemValue in values) {
newItemValue = new OPCDataContract.OPCItemValue(currentOPCItemValue);
result.Add(newItemValue);
}
return result.ToArray();
}
