Siemens Sinamics G120P Operating Instructions Manual page 398

Functions
7.7 Application-specific functions
If you wish to use the real-time clock, you must set the time and date once when
commissioning. If you restore the inverter factory setting, the real-time clock parameters are
not reset. Summer and winter times must be set manually.
Parameter
p8400[0]
p8400[1]
p8400[2]
p8401[0]
p8401[1]
p8401[2]
r8404
p8405
Accept the real-time clock in the alarm and fault buffer
Using the real-time clock, you can track the sequence of alarms and faults over time. When
an appropriate message occurs, the real-time clock is converted into the UTC time format
(Universal Time Coordinated):
Date, time ⇒ 01.01.1970, 0:00 + d (days) + m (milliseconds)
The number "d" of days and the number "m" of milliseconds is transferred into the alarm and
fault times of the alarm or fault buffer, see Section Alarms, faults and system messages
(Page 433).
Converting UTC into RTC
An RTC can again be calculated from the UTC.
Proceed as follows to calculate a date and time from a fault or alarm time saved in the UTC
format:
1. Calculate the number of seconds of UTC:
Number of seconds = ms / 1000 + days × 86400
2. In the Internet, you will find programs to convert from UTC into RTC, e.g.:
UTC to RTC (http://unixtime-converter.com/)
3. Enter the number of seconds in the corresponding screen and start the calculation.
398
Real-time clock (RTC)
RTC time, hour (0 ... 23)
RTC time, minute (0 ... 59)
RTC time, second (0 ... 59)
RTC date, day (1 ... 31)
RTC date, month (1 ... 12)
RTC date, year (1 ... 9999)
RTC weekday
1: Monday
2: Tuesday
3: Wednesday
4: Thursday
5: Friday
6: Saturday
7: Sunday
RTC activate/deactivate alarm A01098
Sets whether the real-time clock issues an alarm if the time is not running in syn-
chronism (e.g. after a longer power supply interruption).
0: Alarm A01098 deactivated
1: Alarm A01098 activated (factory setting)
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A