Siemens SIMATIC S5-115U, Руководство пользователя

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S5-115U Manual Integral Real-Time Clock
DB2 STL Description
0: KH = 0003; --,WEEKDAY //CURRENT TIME
1: KH = 1402; DAY, MONTH
2: KH = 8908; YEAR, HOUR + AM/PM BIT
3: KH = 0000; MINUTE, SECOND
4: KH = 0103; LEAP YEAR, WEEKDAY //SETTING
5: KH = 1402; DAY, MONTH
6: KH = 8908; YEAR, HOUR + AM/PM BIT
7: KH = 0000; MINUTE, SECOND
8: KH = 0003; --,WEEKDAY //PROMPT TIME (SETTING)
9: KH = 1402; DAY, MONTH
10: KH = 0009; --,HOUR + AM/PM BIT
11: KH = 0000; MINUTE,SECOND
12: KH = 0000; --,SECONDS //CURRENT HOURS OF OPERATION
13: KH = 0001; MINUTES, HOURS
14: KH = 0000; HOURS X 100, HOURS X 10000
15: KH = 0000; --,SECONDS //SETTING HOURS OF OPERATION
16: KH = 0012; MINUTES, HOURS
17: KH = 0000; HOURS X 100, HOURS X 10000
18: KH = 0000; --,WEEKDAY // CLOCK AFTER STP/RUN
19: KH = 0000; DAY,MONTH
20: KH = 0000; YEAR,HOUR
21: KH = 0000; MINUTE, SECOND
22:
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Correction Value
To compensate for clock inaccuracy due to the effect of temperature, you can enter a correction
value in system data word (SD) 12 (EA18
H
).
The correction value (in seconds) is based on an operating time of 30 days, i.e. if you see that the
clock of the CPU 943/944 has lost, say, 20 seconds in 30 days, the correction value is +20.
Internally, the operating system corrects the clock every hour by a value smaller than one second.
This ensures that the clock does not "jump" a second (the correction value is read and checked
only once per hour). This compensation is unaffected by the mode selected, i.e. it functions in
both STOP and RUN mode.
Correction value range: - 400 to 0 to+400 (no correction at "0").
You must specify the correction value in "KF" format.
Following an OVERALL RESET, the default value "0" is in SD 12.
If a nonvalid correction value is used, the operating system sets bit No.15 in SD11; in this case, the
correction value is "0".
The time is not corrected on POWER OFF. On POWER-UP, the time correction is updated if the CPU
had battery backup during this time. This correction update is implemented only if the powered-
down state does not last longer than six months. If the CPU remains off for more than six months,
the operating system sets bit 15 in SD11 on POWER-UP and does not correct the time.
EWA 4NEB 811 6130-02b
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