Omron NT15S, Руководство по эксплуатации

Страница: 179 / 233

165
Standard Mode
Section 4-20
4.19.1 Image of Date and Time
The time of day, the date and the day of week are stored in BCD-format.
A maximum of 7 bytes of memory space is required. The address of the first byte is
specified in the variable list. The data contents are defined as illustrated below:
Starting a0 Y Y Year
(Byte 0) (0 to 99)
Starting a1 M M Month
Day
(Byte 1) (1 to 12)
Starting a2 D D
(Byte 2) (1 to 31)
Starting a3 h h Hour
(Byte 3) (0 to 23)
Starting a4 m m Minute
(Byte 4) (0 to 59)
Starting a5 s s Second
(Byte 5) (0 to 59)
Starting a6 W W Weekday
(Byte 6) (0 to 6)
Fig. 19: Structure of the control byte for the time and date
The variable for the day of the week is calendar-independent and always runs
modulo 6. The assignment of a number to a particular day of the week can be
specified by the user when he sets the date and the text for the day.
Possible assignments in the text lists are:
0 Sunday
1 Monday
2 Tuesday
3 Wednesday
4 Thursday
5 Friday
6 Saturday
When entering the date, the user is then responsible for setting the variable for the
day of the week to the correct value.
Example:
21.02.1997 (Friday)
Day of the week in accordance with table above: 5