Company Events Academic Community Support Solutions Products & Services Contact NI MyNI

Forcing VIs

LabVIEW 2013 Help

Edition Date: June 2013

Part Number: 371361K-01

»View Product Info

Owning Palette: NI Scan Engine VIs

Requires: Base Development System (Real-Time, Windows). This topic might not match its corresponding palette in LabVIEW depending on your operating system, licensed product(s), and target.

Use the Forcing VIs to force and unforce I/O variables programmatically.

The VIs on this palette can return general LabVIEW error codes.

Example

Palette ObjectDescription
Clear Variable ForcingUnforces all currently forced I/O variables and I/O aliases on the target.
Disable Variable ForcingDisables forcing for I/O variables and I/O aliases on the target. Unless you clear forcing, the previous forced values return when you re-enable forcing.
Enable Variable ForcingEnables forcing for I/O variables and I/O aliases on the target.
Force VariableForces an I/O variable or I/O alias to assume forced value until you disable forcing, reboot the target, or force the variable to assume a new forced value.
Unforce VariableDiscontinues forcing on an I/O variable or I/O alias and returns control of the I/O value to the NI Scan Engine.

Example

Refer to the Programmatic Forcing.lvproj in the labview\examples\Scan Engine directory for an example of using the Forcing VIs.


 

 Was this document helpful?  submit
  Helpful Not Helpful