Passing a Queue Reference as Sequence Parameter with LabVIew API

[mthimm1]

Hi,

I am running a sequence from Labview with the entryPoint.Run method.

Now I want to pass a queue reference to TS in order to be able to use it as a parameter for an action step (the action should sent information through that queue). I have tried to pass the queue as parameter for the seuqence by setting valVariant of the subproperty object.

LabVIEW throughs error 1 when I try to setValVariant.

The reason why I want to do this is because I want to integrate the sequence execution in my Actor Framework project.

Is there a best practice to pass queue refs as reference to be able to send data to a running application?

Thanks in advance

Michael

[AlexanderBeckmann · Accepted solution]

Hi Michael,

it is not possible to use LabVIEW queue references in TestStand since they are not sharing the same application instance. You can pass a queue reference as an integer (U32 or I32), but you cannot use it in TestStand.

I found 2 possibilities for you to use:

You can use Action Engines in LabVIEW to encapsulate the queue. There is some information about this option in this forum thread:

Solved: LabVIEW Queues and TestStand - Discussion Forums - National Instruments
http://forums.ni.com/t5/LabVIEW/LabVIEW-Queues-and-TestStand/td-p/2554231

However, with this option you need to make sure that the shift register of the Action Engine does not leave memory

.

The recommended method is to create the queue in TestStand using the Synchronization Manager and to then open this queue in LabVIEW. There is an example available for this option:

Using TestStand Queues in LabVIEW - National Instruments
http://www.ni.com/example/30108/en/

I hope this information is useful for you!

Alex