Shared Variable Properties

[ttt1603]

Hello

Using shared variables with the waveform double type please explain the
significance of Network properties which shows options:
No. of Arrays
No. of Waveforms,
Points per Waveform.

Also elaborate for RT FIFO property in the shared variable. It has different
options like
single element, multi element etc. in the drop-down menu.

In which case it is required to enable & use this.

Thank you.

Regards,
Tej Trivedi.

[kishan.M]

Hi Tej,

Here there are few useful links which can help you to understand about shared variables in a better way.

http://www.ni.com/white-paper/4679/en/

http://zone.ni.com/reference/en-XX/help/371361J-01/lvconcepts/ni_psp/

http://www.ni.com/white-paper/5484/en/

hope this helps.

Regads,

M.Kishan

[ttt1603]

Thank You, Kishan.M

I had gone through these links.

What I want to know is the significance of that 3 items for Waveform double type shared variables.

Thanks & Regards.

[RavensFan]

How much data you can buffer on the network.

Click the help button that screen.

[Jacobson-ni]

The help document that RavensFan is talking about is this

http://zone.ni.com/reference/en-XX/help/371361H-01/lvdialog/network_page/

RT FIFOs are explained in a bit more detail at the bottom of this help document but you are mostly only going to use this when reading or writing to a variable inside of a timed loop in a real time VI. The RT FIFO functions should also be used in place of queues if you are communicating to or from a timed loop on a real time device. Not using this feature can lead to priority inversion because of shared resources between the reader and writer.

http://zone.ni.com/reference/en-XX/help/370622K-01/lvrtconcepts/rt_projectvariable/

[ttt1603]

I have 32 wavefrom arrays to write using 1 shared variable. In this case when I kept no. of arrays 1 or more than 32 it didnt make any difference in the output when I read the same variable. Then what is the significance ???