Useful Information; Real Time Clock (Rtc) - Siemens SINAMICS G120P Manual

3 Useful information

Useful information
3
3.1

Real time clock (RTC)

The real-time clock is the basis of time-dependent process control, e.g:
•
Temperature reduction of a heating control at night
•
Pressure increase of a water supply at certain times of the day
Function and settings
As soon as the power supply of the Control Unit is switched on for the first time, the
real-time clock starts. The real-time clock consists of the time in 24-hour format and
the date in "day, month, year" format.
The real-time clock continues to run for approx. five days after an interruption in the
power supply to the Control Unit.
If you want to use the real-time clock, you must set the time and date once during
commissioning.
When you restore the drive's factory settings, the drive resets only p8402 and
p8405 of the real time clock parameters. Parameters p8400 and p8401 are not
reset.
Table 3-1: Parameters of the real-time clock
Step
1.
2.
3.
4.
5.
6.
Note Examples for setting the real-time clock of the SINAMICS G120P drive can be
found in the operating instructions:
https://support.industry.siemens.com/cs/ww/en/view/109757231
Pump with SINAMICS G120P
Entry-ID: 109759888, V1.0.1,
Parameters
p8400 RTC Time (factory setting): 0)
p8401 RTC Date (factory setting): 01.01.1970)
p8402 The factory setting corresponds to the changeover times for
Central European Summer Time (CEST). To activate the
CEST, only p8402[0] = 1 must be set.
p8403 RTC Daylight saving time Difference current [hours]
Display of the current difference between winter and
summer time
p8404 RTC Weekday, 1: Monday ... 7: Sunday
p8405 Activation of the RTC warning display
1: Activate warning A01098
09/2019
Description
•
Index [0]: Hours (0 ... 23)
•
Index[1]: Minutes (0 ... 59)
•
Index[2]: Seconds (0 ... 59)
•
Index [0]: Day (1 to 31)
•
Index[1]: Month (1 to 12)
•
Index[2]: Year (1970 ... 9999)
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