Timezones

[Mrmas]

What is the correct way to read out the current timezone of a Ni linux RT system?

I first looked into reading RTTarget.TimeZone from the ni-rt.ini, but it seems to me that this text field can be very many different formats. How can i either read out the GMT+- currently on the system or convert the tekst from the ini to something i can use? It seems to me the ini supports and sets different values depanding on where you set them from (max, webinterface, programmatically) 

I saw somewhere that this was the supported list for the ini token (below), but i have also seen MET as a timezone so it seems to me that there should be a easier way to get the current timezone of the system.

===================================================================================================
     Without DST    With DST            UTC offset sec    String that shows up in UI drop down box
   ===================================================================================================
   ("UTC12",       "UTC12UDT",          -1200)        // (GMT-12) International Date Line West
   ("BST11",       "BST11BDT",          -1100)        // (GMT-11) Midway Island, Samoa, Bering Straits
   ("HST10",       "HST10HDT",          -1000)        // (GMT-10) Hawaii, Aleutian Islands
   ("MART9:30",    "MART9:30MARDT",      -950)        // (GMT-9:30) French Polynesia, Marquesas Islands
   ("AST9",        "AST9ADT",            -900)        // (GMT-9) Alaska
   ("PST8",        "PST8PDT",            -800)        // (GMT-8) Pacific Time (US & Canada), Tijuana
   ("MST7",        "MST7MDT",            -700)        // (GMT-7) Mountain Time (US & Canada), Mazatlan
   ("CST6",        "CST6CDT",            -600)        // (GMT-6) Central Time (US & Canada), Mexico City
   ("EST5",        "EST5EDT",            -500)        // (GMT-5) Eastern Time (US & Canada), Bogota, Lima
   ("AST4",        "AST4ADT",            -400)        // (GMT-4) Central Brazil, Santiago, Caracas, La Paz
   ("NST3:30",     "NST3:30NDT",         -350)        // (GMT-3:30) Canada (Newfoundland Standard Time)
   ("GRNLNDST3",   "GRNLNDST3GRNLNDDT",  -300)        // (GMT-3) Greenland, East Brazil, Buenos Aires
   ("FALKST2",     "FALKST2FALKDT",      -200)        // (GMT-2) Falkland Islands, Mid-Atlantic
   ("AZOREST1",    "AZOREST1AZOREDT",    -100)        // (GMT-1) Azores, Cape Verde Islands
   ("CUT0",        "CUT0GDT",               0)        // (UTC) Coordinated Universal Time
   ("GMT0",        "GMT0BST",               0)        // (GMT) Greenwich Mean Time, London, Lisbon
   ("NFT-1",       "NFT-1DFT",            100)        // (GMT+1) Continental Europe, West Central Africa
   ("WET-2",       "WET-2WET",            200)        // (GMT+2) Finland, Athens, Jerusalem, Bucharest
   ("USAST-2",     "USAST-2USADT",        200)        // (GMT+2) South Africa, Cairo, Istanbul, Beirut
   ("SAUST-3",     "SAUST-3SAUDT",        300)        // (GMT+3) Saudi Arabia, Kuwait, Iraq, Nairobi
   ("MEST-3",      "MEST-3MEDT",          300)        // (GMT+3) Moscow, St. Petersburg, Volgograd
   ("IRST-3:30",   "IRST-3:30IRDT",       350)        // (GMT+3:30) Iran
   ("WST-4",       "WST-4WDT",            400)        // (GMT+4) Abu Dhabi, Muscat, Baku, Tbilisi, Yerevan
   ("AFT-4:30",    "AFT-4:30AFDT",        450)        // (GMT+4:30) Afghanistan
   ("PAKST-5",     "PAKST-5PAKDT",        500)        // (GMT+5) Pakistan, Islamabad, Tashkent, Ekaterinburg
   ("IST-5:30",    "IST-5:30IDT",         550)        // (GMT+5:30) India, Sri Lanka
   ("NPT-5:45",    "NPT-5:45NPDT",        575)        // (GMT+5:45) Nepal
   ("TASHST-6",    "TASHST-6TASHDT",      600)        // (GMT+6) Almaty, Novosibirsk, Astana, Dhaka
   ("MMT-6:30",    "MMT-6:30MMDT",        650)        // (GMT+6:30) Myanmar, Cocos Islands
   ("THAIST-7",    "THAIST-7THAIDT",      700)        // (GMT+7) Thailand, Jakarta, Krasnoyarsk
   ("WAUST-8",     "WAUST-8WAUDT",        800)        // (GMT+8) Western Australia, Kuala Lumpur, Singapore
   ("TAIST-8",     "TAIST-8TAIDT",        800)        // (GMT+8) Taiwan, Beijing, Hong Kong, Urumqi, Irkutsk
   ("CWST-8:45",   "CWST-8:45AW",         875)        // (GMT+8:45) Western Australia (Caiguna-Eucla)
   ("JST-9",       "JST-9JSTDT",          900)        // (GMT+9) Japan
   ("KORST-9",     "KORST-9KORDT",        900)        // (GMT+9) Korea, Yakutsk
   ("CST-9:30",    "CST-9:30AS",          950)        // (GMT+9:30) South Australia, Northern Territory, Broken Hill
   ("EET-10",      "EET-10EETDT",        1000)        // (GMT+10) Eastern Australia, Guam, Hobart
   ("LHST-10:30",  "LHST-10:30LH",       1050)        // (GMT+10:30) Lord Howe Island
   ("MET-11",      "MET-11METDT",        1100)        // (GMT+11) Solomon Islands, New Caledonia, Magadan
   ("NFT-11:30",   "NFT-11:30NFDT",      1150)        // (GMT+11:30) Norfolk Island
   ("NZST-12",     "NZST-12NZDT",        1200)        // (GMT+12) New Zealand, Fiji, Kamchatka
   ("CHAST-12:45", "CHAST-12:45CHADT",   1275)        // (GMT+12:45) New Zealand (Chatham Islands)
   ("TOT-13",      "TOT-13TDT",          1300)        // (GMT+13:00) Nuku'alofa

 Regards 

Mrmas

[BradM]

I would think that there's some property in the System API "Get Property" node, but if not, you can query the underlying OS if it's a NI Linux RT target using the System Exec function, running date +%:z 

[Mrmas]

Hi,

I belive i found a way to calculate the GMT using this as a basis, 

https://forums.ni.com/t5/Example-Programs/Programmatically-Set-Time-Zone-on-RT-Controller-in-LabVIEW...

Now i am just wondering one thing, it says here "http://digital.ni.com/public.nsf/allkb/CD3E1F89F47CCF2486257A76005B60C1" that setting the timezone using the Set Time.VI automatically sets daylight savingtime to on, but as far as i can see it turns it off and i cant find a way to turn it on again outside of MAX/webinterface.

Regards

Mrmas