Hitachi S10mini D, Hardware Manual

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8 EXPLANATION OF OPERATION
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8.4 Clock Features
This section describes the features of the clock as well as how to set it.
8.4.1 Clock control system registers
Clock control system registers are used by the ladder diagram program for real-time control.
They consist of time registers, a time control register, and a time display control register.
(1) Time
registers
The time registers store information on the year, month, day, hours, minutes, and seconds.
To set a time, set such information in these registers in binary format.
(MSB) 2
15
2
8
2
7
2
0
(LSB)
SW280 Unused Seconds
SW290 Unused Minutes
SW2A0 Unused Hours
SW2B0 Unused Day
SW2C0 Unused Month
SW2D0 Year
SW2E0 Unused Day of the week
Notes on setting a time
• Enter the day of the week using a number: 1 for Sunday, 2 for Monday, ..., and 7 for
Saturday.
• Invalid dates cannot be set. For example, the value 0 or 13 cannot be set as a month, or 0 or
35 as a day.