M1 APPLICATION NOTE
Daylight Saving Time Reminders
With Spring now upon us, it will not be long until many of us must jump ahead in time. You know the drill. You
must manually adjust all the clocks in the home, office, etc. Why not let the M1 remind you every year to
adjust the clocks for daylight savings time? All of your customers will want this feature! This newsletter will
cover examples of how to program the system to give these reminders.
Daylight savings time begins on the last Sunday in October. The rule below will announce “Adjust Time
Tonight” and display “Set Clocks Ahead 1 Hour” on the keypad every 2 hours between 5:00pm and 11:00pm
on the Saturday before daylight savings time begins.
WHENEVER EVERY 2 HOURS
AND TIME OF DAY IS LATER THAN 5:00PM
AND TIME OF DAY IS EARLIER THAN 11:00PM
AND THE MONTH IS October
AND THE DAY(S) OF THE WEEK IS/ARE ------S
AND THE DAY OF THE MONTH IS LATER THAN 23
AND THE DAY OF THE MONTH IS EARLIER THAN 31
THEN ANNOUNCE Miscellaneous 2 (vm240)
THEN DISPLAY “Set Clocks Ahead 1 Hour” IN Area 1 (Area1) INDEFINITELY, [*] CLEARS
(Of course you will need to set up the miscellaneous message)
Daylight savings time ends on the last Sunday in March. The rule below will announce “Adjust Time Tonight”
and display “Set Clocks Back 1 Hour” on the keypad every 2 hours between 5:00pm and 11:00pm on the
Saturday before daylight savings time ends.
WHENEVER EVERY 2 HOURS
AND TIME OF DAY IS LATER THAN 5:00PM
AND TIME OF DAY IS EARLIER THAN 11:00PM
AND THE MONTH IS March
AND THE DAY(S) OF THE WEEK IS/ARE ------S
AND THE DAY OF THE MONTH IS LATER THAN 23
AND THE DAY OF THE MONTH IS EARLIER THAN 31
THEN ANNOUNCE Miscellaneous 2 (vm240)
THEN DISPLAY “Set Clocks Back 1 Hour” IN Area 1 (Area1) INDEFINITELY, [*] CLEARS
With the “AND” statement (shown in bold) the rule will account for the possibility that daylight saving time ends
on the 25th. If this were the case the rule would fire again on the 31st without this “AND” statement.
Will the M1’s clocks require manual adjustment for Daylight Savings Time?
No. The M1 can be programmed to adjust its clock for daylight savings time automatically. This setting is
found in the Global System Definitions menu (Installation Programming-Menu 9, Sub-menu 7, G05) in the
keypad or in NessRP on the Globals screen on the G01-G05 (Miscellaneous) tab.
Got Questions or Ideas?
We welcome your feedback
and any application notes /
Ideas you have.
Please Email me at
m1support@ness.com.au
Ness M1 Application Notes – Daylight Saving Time Reminders