Re: Modbus not working with LabView7 Runtime

[FerozP]

Hi,

I looked into this issue and here's what I found.

http://digital.ni.com/public.nsf/websearch/89E970DB93084AB386256DAE004378A1?OpenDocument";>Null
Window Error when Running Application Built with Sub-VI?

I hope this helps.

Feroz
National Instruments

Re: Modbus not working with LabView7 Runtime

[eps2]

Here is a little twist.  I usually do not show my subVi's when
running.  I did a little more troubleshooting and changed this subVi
to show when called and it works fine.  Any Ideas?

Re: Modbus not working with LabView7 Runtime

[eps2]

Yes, I did rebuild the executable.

Re: Modbus not working with LabView7 Runtime

[eps2]

I am using serial visa as well as GPIB VISA.
The GPIB VISA that I execute before the MODBUS works fine.  I did
rebuild and distribute with serial support selected.  I get a null
node at the execution point for the MODBUS code only in the 7 runtime
environment.

Re: Modbus not working with LabView7 Runtime

[Khalid]

 Did you rebuild the executable using LV7?

Khalid

Re: Modbus not working with LabView7 Runtime

[ScottieB]

Hello,

I have two questions for you:

-What ModBus VI's are you using?  Who wrote them?
-What is the exact error that you receive at runtime while executing
on the LabVIEW Runtime Engine Target?

This sounds like it's an issue of the ModBus VI's depending on
something else that the Runtime Engine isn't providing.

Scott B.
Applications Engineer
National Instruments

Re: Modbus not working with LabView7 Runtime

[Dr. Imad]

Are you using serial VISA ?
if so, you have to install the  VISA run time engine, or when you
build the executable (application builder) enable the selection for
serial port support.