Unable to use units of tick counts or usec with RealTime functions TickCount, Wait, and Wait Until Next Multiple.

[kmcdevitt]

I am using LabView RT on a PXI-8187. The RealTime function TickCount, Wait, and Wait Until Next Multiple always use units of msec, even though usec and tick counts are selectable. How does one get time stamps with resolutions finer that 1 msec?

[Arun_V]

Hello KMC,

Times stamps are always done by software whereas when you go in for either usec or ticks, it starts to get the clock from the hardware and hence timestamps will not be of this resolution. So in short the answer is that there is no way to get a timestamp of lesser than 1 msec.

Regards,

Arun V
National Instruments

PS: Also I have attached the bmp file here as i forgot to attach it in the last thread.

[kmcdevitt]

LabView RT has RealTime versions of the Wait, and Wait Until Next Multiple, and also has a TickCount. All three of the RealTime version allow you to configure the function in units of tick counts, usec, or msec. However, my PXI-8187RT system always waits in msec, even though I select tick counts or usec. What do I need to do to configure LabView RT to use the other units?

[Arun_V]

Hello kmcdevitt,

Looking at this post and you other post where you have stated that you are not able to select the 1 MHz clock, I am guessing that one the dlls that tell the system that it is a P3 or P4 system (required for the MHz clock) got corrupted. The best way out of this is to reformat your system from MAX and reload all the software. Since you have to do it only in the RT system, it hopefully would not take that long. Best of luck.

Regards,

Arun V
National Instruments

[kmcdevitt]

I have applied the Maintenance Releases to update both my LabVIEW and LabVIEW Real-Time from 7.1 to 7.1.1. This seems to have solved the problems.