what is different between functional global variable and file global varial

[GokulGKM]

hi,

     wahat is different between function global variable and file global variable in NI test stand(2014) .

[Norbert_B]

There are no "function global variables" in TestStand. What is this?

Assumption: You talk about "STATION Global Variables".

Station Global: Stored in StationGlobals.ini and availble for all sequence files on the specific test system (installation)

File Global: Accessible in all sequences inside the sequence file which defines the variable, but not accessible in other sequence files.

[GokulGKM]

yes this station global only.

File Global: Accessible in all sequences inside the sequence file which defines the variable, but not accessible in other sequence files.

but still now i am not undershoot what is different because both are using all sequence.

[Nico011]

Hi,

File Globals are used within a single Sequence File. You are right that they can be used by all sequences within that file, but no other sequence file can access that data.

A Station Global stores information outside of the sequence file. It is usually used for storage of test station information, or user information; the kinds of things that don't change between sequences. They also don't return to a default value after sequences execute, they maintain their value after execution.

Nic

[GokulGKM]

ok than what is different local variable file global variable because local variable also using single sequence only . 

[~jiggawax~ · Accepted solution]

Attached is the TestStandSystemandArchitectureOverviewCard.pdf.  Look at the section titled: Sequence File Structure.  It shows the scope of the different variables.  Here is a brief description of all the different types of variables you can have in TestStand:

StationGlobals = Accessible by anything on the station.

Sequence File Globals = Accessible by only members of the sequence file within which the Sequence File Global is defined

Locals = Accessible by only members of the sequence within which they are defined

Parameters = Accessible by only members of the sequence within which they are defined.  Used to pass data from the sequence to the caller and vice-versa

Step Properties = Accessible by only the step within which it is defined

Hope this helps,

[~jiggawax~]

Also- please note that there is a huge difference between sequence file and sequence.  One is a file and one is an object within the file.