Chapter 4 CPU modules MASTER-K
4-23
3) Read / write RTC data
① Read RTC data
The current RTC data
Description
Memory Area
(Word)
Upper byte Lower byte
Data
(BCD format)
F053 Lower 2 digits of year Month h9812
F054 Day Hour h2219
F055 Minute Second h3746
F056 Higher 2 digits of year Date h1902
Example : 1998. 12. 22. 19:37:46, Tuesday
② Write RTC data
There is two ways to write new RTC data to the CPU.
The first one is using a handy loader (KLD-150S) or graphic loader (KGL-WIN). For
detailed information, refer the user’s manual of KLD-150S or KGL-WIN.
The second one is write sequence program. By switching a special bit on, user can
replace the current RTC data with the preset data stored in a specified memory area. The
followings are the memory address of preset data and an example program.
The preset RTC data
Memory Area (Word) Description
K200S / K300S K1000S Upper byte Lower byte
Data
(BCD format)
D4990 D9990
Lower 2 digits
of year
Month h9901
D4991 D9991 Day Hour h1711
D4992 D9992 Minute Second h5324
D4993 D9993
Higher 2 digits
of year
Date h1900
Example : 1999. 1. 17. 11:53:24, Sunday
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