How to Force Update a LabVIEW Front Panel

Issue Details

• My LabVIEW Front Panel is slow or does not update fast enough. How can I force the Front Panel to update?
• I have multiple Waveform Graphs on my Front Panel, which is slowing down the UI. How can I improve it?

Solution

Follow the step below to force LabVIEW's Front Panel to update with the Block Diagram:

• Set the Defer Panel Updates Property to True to immediately force the Front Panel to update.
  • This redraws any Front Panel objects that have pending changes before deferring any subsequent updates.
• Ensure all Controls and Indicators have Synchronous Display enabled.
  • Do this by right-clicking on the Control/Indicator and selecting Advanced >> Synchronous Display. This will force a Front Panel update every time a new value is available.
  • Note: Enabling the Synchronous Display option prioritises Front Panel updates over VI execution. This will force a Front Panel object to update immediately, but does not improve the speed of code.
• Copy and paste the Block Diagram code into a new, blank VI. 
  • This can resolve problems associated with corrupted code.
• Perform a Mass Recompile of  the LabVIEW project to ensure that all VIs are correctly linked and not corrupted.

Additional Information

The Front Panel defaults to an Asynchronous display. Refer to VI Execution Speed for further information. 

Some problems are caused by Block Diagram loops iterating faster than the Front Panel can update. Forcing the Front Panel to update will take processing power and possibly slow down code execution. Corruption within the code may also lead to slow or unexpected behaviour.