WCF and Windows Service

Hello. Please, can somebody advise me? I create WCF library that realizes endpoint net-pipe for job with external WCF.I placed lib in Windows Service. But I dont know how to make data exchange from library without usage of WCF client-server mechanism. How can I put or get data from running WCF service? for example I want to register WCF errors in Eventlog or give parameters to service for transfer them for clients connected to WCF. Thanks a lot

It's not clear what you are trying to do. Can you be more specific? Can you describe the architecture in more detail - what clients are connecting to what wcf services, what the services are doing, what problems you are having, etc?

Thanks.
I have two objects in my Windows Service project. One object is OPC client and database client. If i create this object in code - everything works good. Another object is WCF service library with net.pipe binding for external connection to this service. Ok. I define in my code:

// window service class
public partial class SyncSiemensService : ServiceBase
{
private OpcServiceClass opcServer = new OpcServiceClass();

public SyncSiemensService()
{
InitializeComponent();
}

protected override void OnStart(string[] args)
{
// OPC client- database client object
opsServer.Strat();

// WCF interface for external communication
// with this windows service
using (ServiceHost host = new ServiceHost(typeof(DuplexPipeWcfService)))
{
host.Open();
eventLog.WriteEntry("Запуск WCF интерфейса синхронного сервиса Сименс выполнено успешно", EventLogEntryType.Information);
}
}
}

WCF service

[OperationContract(IsOneWay = true)]
void GetActValuesFromLine(string line);

string line - external data FOR opc object

and his callback

public interface IDuplexPipeWcfServiceCallback
{
[OperationContract(IsOneWay = true)]
void ActualValuesUpdate(WcfDuplexActualValues value);
}

but "WcfDuplexActualValues value" in mine occurrence - data from OPC object for external connection in WCF. And now i dont know, how retrieve data from opc object without usage client-service communication between OPC object and WCF service library.