LabVIEW master VI freeze pending

LabVIEW Lord VI Freeze pending

When running LabVIEW MainVI when , It freezes unexpectedly 、 Suspend or pause .

Doubt one LabVIEW Son VI It takes a long time to execute .

Solution

One possible cause of this problem is a particular child VI Frozen the master VI.

Use Highligh texecution Run code .

Isolate the problematic child VI after , Determiner VI Reasons for not continuing execution . This may be caused by the following reasons , Not just ：

VI The setting in the property will result in the calling sub VI Pause the whole VI.

Open sub VI. then , Select File >>VI attribute .

from Category Select... From the drop-down list Execution, As shown below ：

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Executable files

Make sure it's not selected Suspendwhen called, Then press ok .

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Run the main... Again VI To check whether the problem has been solved .

There is no condition terminal defined while loop . It is not recommended to VI Use in while loop , Because they will lead to the Lord VI Unexpected freeze . however , If there is no other way to complete a task , You can use global variables to stop in the child VI Running in while loop . The following code shows how to do this . Lord VI The architecture consists of two parallel while Cycle composition . The first one is dedicated to updating global variables , The second one is dedicated to running sub VI. This paradigm is inefficient , Therefore, it should be used only when strictly required .

The main VI：

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Son VI：

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Set incorrect event structure .

Ensure that there is no event structure waiting for events .

Make sure that the event structure is placed in the loop , In case you need to detect events many times . otherwise , The event structure will only register the first control change .

Functions that wait indefinitely for operations .

By default , A large amount of data is imported into sub VI.

There is a problem with the driver . for example , When VISA Function freeze MainVI when .

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LabVIEW Lord VI Freeze pending - Beijing Hanwen Wangxing Technology Co., Ltd (bjcyck.com)