Is possible to make a simple vi to read modbus rtu devices using lookout evaluation and labview professional ?

[mauri]

After to buy the lookot I would like to make some communications with a lookout evalutation and my Labview professional. Is possible ?

[Khalid]

Hi,

Do you have the Datalogging and Supervisory Control (DSC) Module in addition to your LabVIEW Professional? If yes, then please write back as the approach is different (and easier).

Assuming you only have LabVIEW Professional (and not DSC module), to connect to the Modbus device using Lookout OPC Server, please see the following tutorial:

http://zone.ni.com/devzone/conceptd.nsf/webmain/DF8C0A4BA2E2B22A86256A3700592BEA?opendocument


You must know that if you have lot of I/O points, the above approach of using just LabVIEW (without the DSC module) becomes cumbersome and degrades the performance as well. For more I/O points, and for features li
ke Alarms, Historical data, Events, Security, you will want to use the DSC Module.

Hope this helps. Please write back if you have any questions.

Regards,

Khalid

[mauri]

Thanks for your help, Khalid.
My apllication is engine calibration, and now I´m using a Rack SCXI1000, some boards, one aquisition card and labview professional. I would like to make file to aquisite from this system and now I have one speed control Woodward (communication Modbus RTU master) whose I can aquisite some values.
Is possible to create this file .exe without to install the lookout in computer?



Regards,
Mauricio

[Khalid]

To talk to your Modbus device you need some driver, right? And you will need this on every computer. Now, the option you're using for this driver is the Lookout OPC Server. So this needs to be present on every computer as well.

Short answer: no; you cannot combine the Lookout driver into your LabVIEW executable. You will have to install it separately.

If your goal is to really combine "the driver" in your EXE, you may want to look into VI-based drivers for Modbus devices. The are native drivers (as opposed to OPC). And I believe there are some freeware versions around. You may be able to bundle these into your EXE.

Hope this clear things up a little.

Regards and Ciao!

Khalid