OPC Client under Windows CE

[Rumcajs]

Does anybody know how to read/write items values from/to OPC Server on handhelds with WindowsCE.NET ?

More details:

Somewhere on the net is working OPC Server (grabbing proces data from PLC's)

I'd like to write aplication in LV7.0 + PDA Module which will be writing and reading items from/to this OPC Server over network.

DataSocked, ActiveX and probably DSC doesn't work under WindowsCE.NET.

Any ideas ?

Rumcajs.

[tst]

I remember looking once and I found several companies which made OPC clients for CE. OPC labs is a name that springs to mind, but there are probably some others. I haven't tried any of them.

If you still want to use LV, you should probably write your own LV server, which will run on the server computer and talk to the OPC server and on the PDA have a client which will talk to the LV server using your own TCP protocol.

The other option I can think of is getting some DLLs with the OPC access functions, but you will need to know how those access those DLLs, and you will need the source code to build the application.

[Rumcajs]

I've been thinking about this type of solutoin: VI server on the OPC server machine and VI client on the Handheld, but i isn't so smart and universal.

Probably the only solution will be (as sugessted by tst) to call OPC Vendor DLL's.

I'm not very fluent in .NET technology, but maybe this is an other way to do it ?

I've seen some .NET OPC Client components over network and it should work on WindowsCE.NET but how do do it in LV ?

Regards.

Rumcajs.

Message Edited by Rumcajs on 08-30-2005 07:17 AM

[Philip_Courtois]

Hi Rumcajs,

The current version of the LabVIEW PDA module (7.1) does not support calls to external code in the form of .NET assemblies. However, it DOES support calls to C-style DLLs and the way to do it is shown in the following example:

Calling External Code in LabVIEW PDA for Pocket PC - Battery Information Example

Please let me know if you have any further questions, thanks.

Have fun!

[Rumcajs]

I'm looking for this type of .dll , e.g. OPC Client in form of .dll for WindowsCE.NET (4.1), but cannot to find.

Does anybody has ever seen on the net ?

Rumcajs.