04-18-2006 08:31 AM
Hi all,
I have a problem with selecting DataSocket in "Data Binding Selection" when I want to bind a front panel control to an item in another server such as an OPC Server. I want to know whether we connect to that item via OPC Server or DataSocket Server after specifying an OPC URL. The LED_DataSocket near the front panel control planned to bind to an OPC Server's causing this doubtfulness for me.
And I want to know in a big application what the difference between these two is:
Connecting a front panel control to an OPC Item selecting:
NI_PSP\network Items\then selecting the item from an OPC client instance currently created or,
DataSocket\browse\ finding the item we want through Servers listed.
Please advice.
04-19-2006 05:31 AM
04-20-2006 11:39 AM - edited 04-20-2006 11:39 AM
I'm working on a big HMI application with more than 200 I/Os. if I want to read/write these data items from an OPC server, do you mean it's better to use shared variables bound to OPC data items, then read/write directly the shared variable from a front panel object, connecting a shared variable node to it?
I want to know if I bind my all front panel objects to shared variables or OPC items via NI-PSP or Datasocket, for this number of I/Os, it works. And what are the differences between these two technologies?
I 'm for the best way of gathering data from an OPC Server.
Message Edited by Maryam on 04-20-2006 11:41 AM
04-21-2006 04:14 AM