FlexStat
15
Operation Guide, Rev. L
(Advanced) Date/Time
DATE/TIME
DATE:
TIME: 1:43:59 PM
UTC OFFSET: 300
DST ENABLE: TRUE
DST AUTO: TRUE
DST START:
>2ND SUN MAR 2:00 AM
APRIL 11 2009
NOTE: When a FlexStat is powered up after
losing the RTC (Real Time Clock) time, it
will revert to the default time and date of
January 1, 2000, 12:00:00 AM.
To enter date and time information, press:
1. Up
/
Down
to move among entries.
2. Enter
to select.
3. Right
/
Left
to move among value fields.
4. Up
/
Down
to increment/decrement value.
For areas that observe DST (Daylight Saving Time),
select True/On for DST ENABLE. The
DST period is
currently the second Sunday of March through the
first Sunday of November, but these dates can be
changed in the menu if the official period changes or
if the installed location needs a schedule adjustment
for better operation.
NOTE: An issue can occur
if a FlexStat has been
unpowered long enough for it to lose its
RTC timekeeping during the period DST
is in effect AND a time synchronization
command is sent from BACstage or
TotalControl
to the FlexStat. The time will
be restored to the correct time and date.
However, the FlexStat will assume that this
time is non-DST. Within about one minute
after the initial time synchronization
(during DST months), the device time will
reset to DST mode, and the device time will
move one hour ahead. This will affect the
displayed time on the LCD display as well
as any schedules. This issue will not affect
powered-up FlexStats during non-DST
periods (e.g., most of November through
February). If the time has erroneously
advanced one hour after an initial time
synch command, the easiest solution
is to simply send a second time synch
command. This will correct the device time.
Alternately, the hour can be changed in the
FlexStat’s menu.
If the FlexStat is used in a BACnet network with UTC
(Coordinated Universal Time) synchronization (via
broadcasting or addressing a single thermostat) set the
UTC Offset value. The UTC Offset value is in minutes
and corresponds to the distance of the local time zone
to the zero degree meridian. In stand-alone operation
or networks that do not have UTC broadcasts, setting
this value is not necessary.
Sample Time Zones
Offset to Equal UTC
Alaska
9 hours =
540
minutes
USA/Canada Pacific
Standard Time
8 hours =
480
minutes
USA/Canada Mountain
Standard Time
7 hours =
420
minutes
USA/Canada Central
Standard Time
6 hours =
360
minutes
USA/Canada Eastern
Standard Time
5 hours =
300
minutes
Bolivia, Chile
4 hours =
240
minutes
Argentina, Uruguay
3 hours =
180
minutes
United Kingdom,
Portugal
0 hours =
0
minutes
Europe (most countries) –1 hours =
–60
minutes
Egypt, Israel, Turkey
–2 hours =
–120
minutes
Kuwait, Saudi Arabia
–3 hours =
–180
minutes
United Arab Emirates
–4 hours =
–240
minutes
India, Sri Lanka
–5.5 hours =
–330
minutes
China, Mongolia
–8 hours =
–480
minutes
Korea, Japan
–9 hours =
–540
minutes
New Zealand
–12 hours =
–720
minutes
NOTE: The BACnet standard for this offset value
is: “The time zones to the west of the zero
degree meridian shall be positive values,
and those to the east shall be negative
values.” The value is in
minutes
, not hours.
