help

[levis]

I want to design a SCADA system demo. I have bought Lookout program
and PCI-6024E AD card.
I can not find the object in lookout program for "PCI-6024E"

I follow the steps below, right?
1. create new data neighborhood in MAX
2. connect lookout opc server and wizard
3. open datasocket server
4. creat datasocket object in lookout program

Counld anyone help me?

[Khalid]

Hi Levis,

You will be using NI-DAQ OPC Server to talk to your DAQ card from Lookout (using the OPC Client object in Lookout). So, first, make sure you have the DAQ-OPC Server installed. This is installed as part of the NI-DAQ installation.

The DAQ card is your source of data, which you will configure as usual in NI-MAX (creating virtual channels, etc.). DAQ-OPC Server now serves this data to the rest of the world, Lookout in ourcase. To talk to this from Lookout, Lookout has to act as the OPC Client. This is done using the OPC CLient Object in Lookout. When you create this OPC Client object, you would select the DAQ-OPC Server (listed as 'National Instruments.OPC Server') from the list of OPC Servers found on your machine. From then on the OPC Clien
t object would represent your DAQ card and you can use its datamembers. etc., to read/write data.

I am pretty sure there are some KnowledgeBase articles on here about hooking Lookout to DAQ. You may want to search and go thru' them as well.

Hope this helps.

Regards,

Khalid

[Carl_Finley]

Be careful with the OPC client object. There are some unresolved issues with this driver. When you set up the OPC Client, there is a check box giving the option of using asynchronous I/O or not. This option is checked by default, if you leave it checked your hyper-trends will not show the desired results. If the value you are trending does not change for awhile, your trend will not continue plotting leaving big blank spots on your trend. This can be resolved by unchecking the asynchronous I/O option, however if you do that, logical data member do not function properly. For example if you disconnect you data source, you will NOT get red Xs on your screen showing that communications has been lost. I have brought this to NI's attention and I guess they are eithe
r working diligently on it or are ignoring it.

[vijtin]

Dear Friends,

We are using Labview7.0 & we want to use NIhyper trend tool for graphical display. Right now i am using NI Hyper trend throgh option given in TOOLS -> DSC -> View Historical Data but same thing i want to implement programmatically so plz suggest me how i can use NIhyper trend tool.

Anisha