daylight saving over, did your PLC work correctly?

[CAI_Support]

We had in the past discussed DST function.  Don't know if new users see that discussion in the past. If your logic is based on hour of the day, it would be nice to have DST consideration in the code.
 
 

http://cocoontech.com/forums/topic/24147-dst/page-2

 
 

 

[Tschmidt]

To keep my systems simple I ignore daylight savings time. For the greenhouse controller that actually works out better then adjusting time.
 
/tom

 

[LarrylLix]

Perhaps if the whole world sets their software to attack the time bases when DST changes and cause a D.O.S. crash we can get the governments to stop inflicting their personal preferences for specific numbers used for specific tasks during the day. Get rid of the DST stupidity!
 
It's only a number. Why does the whole world need to have the same number when the sun comes up? Now we need computers to tell us what time it is in various places in the world.
 
 
 
 
My WC8 was still on DST. Thanks for the reminder!

 

[rossw]

Perhaps if the whole world sets their software to attack the time bases when DST changes and cause a D.O.S. crash

 
One of the most stupid, irresponsible comments I've seen in this forum ever.
 
If you don't like it, just do like most network operators - run in UTC.
UTC timestamps make it very simple to do just about anything, and eliminates any consideration of "daylight savings" forever.

 

[LarrylLix]

I'll start informing my TV's, clocks, clock radios, watches, banks, and stores open to the public about that wisdumb. I'm sure they will be convinced and follow it. 
 
Strange. I was just reading a current survey about DST. 40% want to stay on DST permanently, 33% want STD time permanently, and 27% want to keep the status quo. About 50,000 people have participated, so far.

 

[CAI_Support]

DST is pain for a lot of people, some states do not use DST. Russia recently also stopped using DST.  UTS is actually being used in most computers internally, including WebControl. When email sent or HTTP request sent, all the time base is UTS.
 
For Tom, his plants in greenhouse probably does not care much DST, but sunrise and sundown tune, I wish all our offices and schools can use that as hours to start the day and finish the day.  For WC user who has to follow DST in different part of the world, he has to figure out how to use the DSTON commands in PLC to adjust the local time. The pain is that every country has a different day and hour to start and to end the DST.

 

[ano]

In Arizona we do not use DST, so when the clocks change elsewhere, I spend my time unadjusting the time changes in clocks that think they are so smart, but don't offer a way to shut off DSL adjustments.