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RT app needs system time from Windows PC


JeremyMarquis

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I have an RT PXI controller, and I am wondering the best way to get a networked PC's system time so I can periodically sync to it (in a controlled way, such as when RT system is idle).

 

Obstacles:

The PC is not running any LabVIEW code, so no PC publishing time to network shared variable stuff

The code on the PC is legacy C# code that I cannot modify to include timestamp messaging between systems

The PC and attached RT PXI are network isolated, so no using a domain controller time service

 

 

My only solution to get the time from this generic windows PC (assume WinXP or newer) is to install an NTP time service on it that I can query via UDP from the RT application.  I have done this before, but it just feels unsatisfactory.

 

Anyone else solve this problem before?

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See the reply from NI on my idea to implement native support for this...it turns out it is supported, just not very obviously:

 

http://forums.ni.com/t5/LabVIEW-Real-Time-Idea-Exchange/Support-industry-standard-time-server-NTP-e-g/idi-p/2340392

 

Here's an implementation using the System Config API:

 

https://decibel.ni.com/content/docs/DOC-26987

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There's this KnowledgeBase entry about setting up your computer as a time server over on the dark side...

 

http://digital.ni.com/public.nsf/allkb/EA90C9FF24D9A041862575EE004ED415

 

This is the very NTP service I used before for this, I was just hoping to avoid any install on the PC, since it is owned by another group.

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