Setting the 'WAIT' function

Hi,
Can someone help me to set the wait function to 5 minutes ?
Thanks In advance
Eldad

Set the Wait Mode attribute of the activity to Relative Time, and set the Relative Time attribute to the relative time interval
you want, expressed in <days>.<fraction of days>.
See: http://otn.oracle.com/docs/products/oracle9i/doc_library/release2/workflow.920/a95265/std04.htm#index-Wait-activity---0
Regards,
Clara
Hi,
Can someone help me to set the wait function to 5 minutes ?
Thanks In advance
Eldad

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Using the Wait function in while loops?

Hi,
I have a rather complicated top level VI with about 20 subVIs and the main VI has on big while loop around it and another smaller one inside, basically it runs rather slow and I have no idea how to set the wait function. I mean what factors should I consider..what would be the difference between setting it to 10 and 100 (besides the obvious 10ms vs 100ms)? I just want to increase the performance of the executable, so it is not that slow. Can you offer some hints as to what I need to take into consideration when determining my delay? And also, are while loops the only place that I should use the delay or are there other instances too?

Adding waits is not a fix-all for slow running applications. Its just one thing that can be done to improve things. If you determine that a sub-vi is causing your problems then you need to find out exactly what that vi is doing to slow you down. If its because there is a loop inside it that is running constantly as fast as it can, then a delay in that loop may help. If that is not your problem then you need to look at other ways to boost performance. It sounds like you have alot of locals variables, each instance of a local variable makes a copy of the data that's in the control. If the controls/indicators that you have local variables of contain large amounts of data then you may be filling up memor
y with copies of it.
I suggest that you study the "Performance and Memory Management" chapter of the LabVIEW manual. This can found in the printed manual of the older versions, in the online manuals that install with 6i, or on NI's web site here: http://zone.ni.com/devzone/conceptd.nsf/2d17d611efb58b22862567a9006ffe76/732cec772aa4fbe586256a37005541d3?OpenDocument , which is Application Note 168. This should give you some good ideas of what to look for to improve your performance.
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How to isolate the wait function to one part of the code

I'm buildling an ecg montoring system along with programming an external stimulator using TTL pulses to work along side the information obtained from the ECG.The most important of these features is the heart rate. However, whenever I activate my pulse trains in the code, the DAQmx Wait Until Done.vi function pauses everything in the code, including the part of my code that monitors the heart rate, which uses time to measure it. What I would like, is the wait function to only affect the pulse train generators without pausing anything else in the code. Is this possible? And if so how can I make it happen?
I will attach my vi
Solved!
Go to Solution.
Attachments:
simulatejed.vi ‏130 KB

Your problem is that everything is in the same loop. So the longest operation is going to determine the loop rate (and therefore processing rate). What you really need to do is separate your tasks into separate loops. Use queues and/or notifiers to communicate your data and commands between loops.
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Where do I set the Transfer Function in Adobe Photoshop CS5?
My college newspaper uses Transfer Function to control dot gain in B&W photos, saving them as EPS files.
In CS4 it was a button in the print dialog box, in the output section. It brought up a curves-like dialog to set a transfer curve. That button is gone now, and the help files offer no help.
The help files say "Save your file in the Photoshop EPS format, and select the Include Halftone Screen and Include Transfer Function options in the EPS Options dialog box." but doesn't say where to create the curve.
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Hello!
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I wrote a VI to store the time stamps in a text file.
I fond something strange in the text file (see the picture below).
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To further what was just said:
The wait function will indeed wait 10ms, or near enough as I will soon explain.
When used in a loop, the wait function will wait for 10ms AFTER the code inside the loop has been executed.
Depending on your Operating System, and the speed of your PC, the code inside the loop could take several hundred milli-seconds to execute.
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I am confused by wait function in LabVIEW. I have a while loop and the calculation time duration for each iteration is about 0.1ms without using wait funtion inside of the loop. However when I tried to add wait function and set the wait time to be 1ms, the average iteration duration became 5ms. Does it mean the iteration took 5ms to run each time? If it is the case, how did I get 0.1ms before using wait function? I also tried to add the wait time from 1 to10 and before 5 it gave me similar answer 5ms after 5 it give me the number I specified to it, so I think it works fine. I also attached my VI to it, I am using cRIO to run this VI so it wont work on the computer but the idea should be clear.
Attachments:
Untitled 4.vi ‏55 KB

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Thanks for your reply, basically this attached vi is only part of my code, and I would like to track the change of different variables on FP so I would like to have local variables inside of the loop instead of using shift register. The index constant is not necessary for sure, thanks for that info.
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Best Regards
Jeff·Þ·Bohrer wrote:
OK First off lets introduce you to the concepts of arrays and a Shift Register:
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Next, you only index them to feed them to indicator's local variables only to read them on the next iteration a feedback node or shift register of type array of dbl would work so much better! and, not require the UI Thread at all! Really none of those controls or indicators are wired to the connector pane- for debug use a probe!
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Setting the 'WAIT' function

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