Clock Features; Clock Control System Registers - Hitachi S10mini S Hardware Manual

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
SW280
SW290
SW2A0
SW2B0
SW2C0
SW2D0
SW2E0
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.
15
2
Unused
Unused
Unused
Unused
Unused
Year
Unused
8 EXPLANATION OF OPERATION
8 7
2
Seconds
Minutes
Hours
Day
Month
Day of the week
- 79 -
0
2 (LSB)