Incorrect timestamp to string conversions?

[Matthew_Williams]

Why does this code give different times when the UTC format? input changes?  The FieldPoint controller

timezone is set to UTC and compensate for DST is disabled.  I would expect the two conversions to give the

same result in this case but they don't.  RT 8.5.1.  The timestamps of readings in MAX are correct and the

string formatted with UTC format? True is correct.

Thanks.

Matt

[Justin_P]

Hi Matt,

I have been able to reproduce the behavior that you are seeing in LabVIEW 8.6.1 as well.  I'm going to have to look into this a little further to determine what is going on.

[Matthew_Williams]

Thanks Justin.  This started as a query from a customer running RT 6.1, so it looks like

we have confirmation for 6.1, 8.5.1 and 8.6.1.

Matt

[Justin_P]

Hi Matt,

I checked into this and R&D is aware of the issue.  It seems to affect the PharLap FielPoints but not the VXworks FieldPoints.  You should get the correct information by wiring a True to the UTC terminal.  This is supposed to be fixed in a future release, but I can't give any specifics.

Is this causing any issues, or were you just curious why this behavior existed?

[KevSalmon]

We're still seeing this in LabVIEW 2012.

But it only appears to affect dates in BST, as soon as you get back into GMT this '-1' day error goes away

[Justin_P]

Hi Kevin,

I'm no longer on the RT support team, but the CAR was 41190 and was fixed.  But looking at the VI I see it has an event structure, making me think that its not being run on an RT target.  

Are you seeing this on an 21xx FP in LV 2012?

[KevSalmon]

Hi Justin,

No - I realised as I posted this, that it wasn't related to LabVIEW RT - but my original search only found this thread...

I've since found http://forums.ni.com/t5/LabVIEW/Time-Conversion-from-Local-to-UTC-Help-Daylight-Savings-Problem/td-p...

It appears to be a standard LabVIEW 2012 'feature' - you can move my post to the above thread if you wish

Cheers

Kev

[Justin_P]

No worries, I just wanted to make sure I understood your question (and if I needed to reopen a CAR).  

I happy to hear you found your answer.