W.,
one more line needs to be added:

easyDAClient1.UpdateRates.ReadAutomatic = System.Threading.Timeout.Infinite;

This tells the component that it should not set up an active group when you read something.

From: W.
Sent: Tuesday, July 12, 2011 8:24 PM
To: Zbynek Zahradnik
Subject: How to Read from Device

Zbynek,

I am trying to read from the Server instead of setting up a subscription. I am using the code below but it still appears to be establishing a subscription instead of a read. I am using v5.4.102. Why is this not working? I must be missing something.

---

easyDAClient1.ClientMode.DataSource = OpcLabs.EasyOpc.DataAccess.DADataSource.Device;


OpcLabs.EasyOpc.ServerDescriptor server = new OpcLabs.EasyOpc.ServerDescriptor("SWToolbox.TOPServer.V5");

OpcLabs.EasyOpc.DataAccess.DAItemDescriptor[] items = new OpcLabs.EasyOpc.DataAccess.DAItemDescriptor[2];
items[0] = new OpcLabs.EasyOpc.DataAccess.DAItemDescriptor("Channel_1.Device_1.Tag_1");
items[1] = new OpcLabs.EasyOpc.DataAccess.DAItemDescriptor("Channel_1.Device_1.Tag_2");

easyDAClient1.ReadMultipleItems(server, items);

---

Thanks,

W.