Labview/induscreen via une liaison OPC

Question

Bonjour,
Je souhaite faire communiquer labview 6i et induscreen 4.1 via une liaison
OPC mais je n'arrive pas a trouver la syntaxe...
La liaison s'effectue avec le serveur OPC d'induscreen
(Induscreen.OPCServer).
Esc-ce que quelqu'un connais cette syntaxe et peut me la faire parvenir?
Merci.
CMH AUTOMATION
Bureau d'Etudes
ZA du Tuboeuf
Rue gloriette
77170 BRIE COMTE ROBERT

Answer 1

Hello, CMH....I apologize for not answering this question in frech but je ne parle pas frances...
Anyway, If you have labview 6i, you can access the OPC server either using the DataSocketopen.VI or using Frontpanel Datasocket.
Frontpanel Datasocket, in my opinion is the easiest. The only thing that you need to do is to create a control on the front panel, right click on the control, and then go to data operations/data socket connection and then browse(browse measurement data)and select the OPC Server/item that you are using....this is pretty straight forward.
Now, if you want to use the datasocketopen.VI, you will need to have the right sintax at the URL connector in the Datasocketopen.VI in order to be able to communicate with the OPC Server.
The generic sintax for
the URL connector at the datasocketopen.VI to select an OPC Server/Item is shown below:
opc://
or
opc://?updaterate=xxxx
where xxxx is the update rate.
Below, you can see the URL sintax for a datasocketopen.VI used to get data from channel 0 of a FP-AI-100 module, using the National Instruments OPC Server.
opc:/National Instruments.OPCFieldPoint/FP Res\FP-AI-100 @1\Channel 0?updaterate=1000
where
is the OPC Server.
is the OPC Item
and
updaterate=1000 is the parameter for the update rate.
There are very good examples that come with LabVIEW 6i, just go to:
search examples/communication/datasocket OPC.
Check out the OPC to URL VI used for most of the examples. This VI helps you with getting the right sintax on the URL connector in the datasocketopen.vi.
Also, please contact the distributor of the OPC Server (Induscreen)and ask them the specific details on defi
ning item names with their OPC Server.
I hope this helps.
Arevoir.