Cutler-Hammer D320 PLC, Руководство пользователя

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Chapter 5: CPU Operation and Memory
61
SR290 to SR297 (W2849 to W2857) Realtime Clock Functions
Sets the time of the built-in clock (RTC) and stores and displays the current time. Data is stored in BCD format.
Bit Control Contents Address Control display
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
SR289 This year
(4 BCD) Example: $1998, $2000
SR290 Date: day × × × × × × × × ×
SR291 Year: month × × × × × × × × × × × ×
SR292 Second: 00
× × × × × ×
Current
Time
SR293 Time: minute
× × × × × × × × × × × × ×
SR294 Date: day × × × × × × × × ×
SR295 Year: month
× × × × × × × × × × × ×
SR296 Second: 00
× × × × × ×
Set
Time
SR297 Hour: minute
× × × × × × × × × × × × ×
: bit = 0; × : bit change
Note:
1. Set the range as follows:
•
Year: 00 to 99
•
Month: 01 to 12
•
Date: 01 to 31
•
Day: 01 to 07 (Sun. to Sat.)
•
Hour: 00 to 23
•
Minute: 00 to 59
•
Second: 00 to 59
2. Ladder setting method:
•
For example, current date and time are: Tuesday, August 25, 1998, 18:35:07.
3. When changing the year, month, date, or day, new data is input in W2855 and W2854, then
the F12.14 bit is turned On. The F12.10 bit is kept Off.
Designate year,
date, day
Designate hour
min. sec.
R
R
DLET
D=W2854
S=$98082503
DLET
D=W2856
S=$18350700
F12.13
(OUT)
F12.14
(OUT)
Date indicators are SUN (01),
MON (02), TUE (03), WED (04),
THU (05), FRI (06) and SAT (07)