public void OPCConnectAndReadTest()
{
// connect to local kepware server (UA)
OPC.Client client = new UAClient("127.0.0.1", 49320);
Assert.IsTrue(client.Connect());
// demand read a value
OpcValue value = client.Read("Simulation Examples.Functions.Ramp2", 2);
Assert.IsTrue(value.Status.IsGood);
// subscribe to a value
client.DataChange += Client_DataChange;
client.Subscribe("Simulation Examples.Functions.Ramp2", 2); // this format is outdated
// wait up to 2 seconds for a DataChanged event
Thread.Sleep(2000);
// and clean up
client.DataChange -= Client_DataChange;
client.Dispose();
// now do it again, using OPC DA
client = new DAClient("127.0.0.1", "Kepware.KEPServerEX.V6", "{7BC0CC8E-482C-47CA-ABDC-0FE7F9C6E729}"); Assert.IsTrue(client.Connect());
// demand read a value
value = client.Read("Simulation Examples.Functions.Ramp2", 2);
Assert.IsTrue(value.Status.IsGood);
// subscribe to a value
client.DataChange += Client_DataChange;
//client.Subscribe("Simulation Examples.Functions.Ramp2", 2); this format is outdated
// wait up to 2 seconds for a DataChanged event
Thread.Sleep(2000);
// and clean up
client.DataChange -= Client_DataChange;
client.Dispose();
}
public Query(UAClient uAClient)
{
_uaClient = uAClient;
}
public GQLSubscription(UAClient uAClient)
{
_uaClient = uAClient;
}