Passing Parameters to LabVIEW Code Modules

The following table lists the parameters the ATML TD translator always passes to a LabVIEW code module:

Parameter Name Value Description Comments
Sequence Context RunState.ThisContext Object reference The translator passes the Sequence Context parameter so you can access any variable in TestStand from the generated VI.
<Parameter> element — — <Parameter> elements are [In] parameters.
<TestResult> or <SessionDatum> element — — <TestResult> and <SessionDatum> elements are [Out] parameters.
PASS/FAIL Flag Step.Result.PassFail Boolean A return value that indicates if the test passed or failed. The translator passes the PASS/FAIL Flag parameter to the code modules only if the translated step is a Pass/Fail Test step.
Error Out Step.Result.Error Container A return value that contains the error state. LabVIEW passes the Error Out parameter back to TestStand.

If the total number of [In] and [Out] parameters to pass to the VI is 28 or fewer, the translator places the local variable it creates for <Parameter>, <TestResult>, and <SessionDatum> elements under the Locals for the sequence. If the total number of parameters exceeds 28, the translator creates a container under the Locals for the sequence, names the container actionName_Parameters, actionName_TestResults, or actionName_SessionData, respectively, and passes the container to the LabVIEW code module as an object reference. The actionName is the value of the name attribute of the parent <Action> element.

ATML TD schema files define into TestStand and LabVIEW types. The following table shows how the translator translates simple types for <Parameter> and <TestResult> elements that the TestDescription.xsd and Common.xsd:

TestDescription.xsd Type Common.xsd Type TestStand Type LabVIEW Type
unsignedInteger unsignedInteger Number with unsigned integer format Numeric
string String String String
octal Octal Number with octal format Numeric
integer Integer Number Numeric
hexadecimal Hexadecimal Number with hexadecimal format Numeric
double Double Number with double numeric format Numeric
binary Binary Number with binary format Numeric
boolean Boolean Boolean Boolean

For the strict ATML TD types the ATMLTDTypes and ATMLTD_IEEE1641_Types type palette files define, the translator passes each type as a container to the code module. The translator passes all other types as object references.