Table Of Contents

Reset Interchange Check (G Dataflow)

Last Modified: January 29, 2018

Configures interchangeability-checking algorithms to ignore all previous configuration options.

connector_pane_image
datatype_icon

session in

Instrument session obtained from the Initialize With Channels node.

datatype_icon

error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

datatype_icon

session out

Handle used to identify the session in all subsequent NI-DCPower node calls.

datatype_icon

error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Clearing Interchangeability Warnings

This node does not clear the interchangeability warnings from the list of previously recorded interchangeability warnings. If you want to guarantee that the Get Next Interchange Warning node only returns those interchangeability warnings that are generated after calling this node, clear the list of interchangeability warnings by repeatedly calling the Get Next Interchange Warning node until no interchangeability warnings are returned. If you are not interested in the content of those warnings, call the Clear Interchange Warnings node.

Ensuring that the Test Module is Completely Configured

When developing a complex test system that consists of multiple test modules, it is generally a good idea to design the test modules so that they can run in any order. Doing so requires ensuring that each test module completely configures the state of each instrument it uses. If a particular test module does not completely configure the state of an instrument, the state depends on the configuration from a previously executed test module. If you execute the test modules in a different order, the behavior of the instrument and therefore the entire test module can change. This behavior change is generally instrument-specific and represents an interchangeability problem.

You can use the Reset Interchange Check node to test for such cases. After you use this node, the interchangeability-checking algorithms in NI-DCPower ignore all previous configuration operations. By using this node at the beginning of a test module, you can determine whether the test module has dependencies on the operation of previously executed test modules.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application


Recently Viewed Topics