6F3B0250
6. Programming Information
6.3 Real-time clock/calendar (T1S only)
The T1S is equipped with the
These data are stored in the special registers SW07 to SW13 by
Register | Function | Data |
SW07 | Year | 1998 = H0098, 1999 = H0099, 2000 = H0000, 2001 = H0001, ... |
SW08 | Month | Jan. = H0001, Feb. = H0002, Mar. = H0003, ... Dec. = H0012 |
SW09 | Day | 1st = H0001, 2nd = H0002, 3rd = H0003, ... 31st = H0031 |
SW10 | Hour | H0000, H0001, H0002, ... H0022, H0023 |
SW11 | Minute | H0000, H0001, H0002, ... H0058, H0059 |
SW12 | Second | H0000, H0001, H0002, ... H0058, H0059 |
SW13 | Week | Sun. = H0000, Mon. = H0001, Tue. = H0002, ... Sat. = H0006 |
Program example:
In the following circuit, output Y030 turns ON for 1 minute at every Sunday 6 pm.
(H0018)
Clock/calendar back-up:
The clock/calendar continues updating even while the power to the T1S is off by
Temperature | Expected value | Guarantee value |
25 °C | 300 hours | 168 hours |
40 °C | 144 hours | 72 hours |
In the T1S, the validity of the clock/calendar is checked. If the data is not valid by excess power off period, special relay S00A is set to ON. Therefore, when the clock/calendar is used, it is recommended to check the status of S00A in the user program.
Setting the clock/calendar:
To set the clock/calendar data, the following 2 ways are available. In both cases, the week data is automatically calculated.
(a)Setting the clock/calendar data on the system information screen of the programming tool.
(2) Using the Calendar Set instruction (CLND) in the user program.
106 T1/T1S User’s Manual
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