Siemens SINAMICS G120 Operating Instructions Manual page 282

Advanced commissioning
6.7 Application-specific functions
Parameter
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 inverter converts the real time clock into the UTC time
format (Universal Time Coordinated):
Date, time ⇒ 01.01.1970, 0:00 + d (days) + m (milliseconds)
The inverter takes the number "d" of the days and the number "m" of the milliseconds in the
alarm and fault times of the alarm and/or fault buffer, see also: Alarms, faults and system
messages (Page 347).
Converting UTC into RTC
An RTC can again be calculated in the UTC format from the saved fault or alarm time. In the
Internet, you will find programs to convert from UTC into RTC, e.g.:
UTC to RTC (http://unixtime-converter.com/)
Example:
Saved as alarm time in the alarm buffer:
r2123[0] = 2345 [ms]
r2145[0] = 14580 [days]
Number of seconds = 2345 / 1000 + 14580 × 86400 = 1259712002
Converting this number of seconds in RTC provides the date: 02.12.2009, 01:00:02.
The times specified for alarms and faults always refer to standard time.
282
Real time clock (RTC)
RTC weekday, 1: Monday ... 7: Sunday
RTC activate/deactivate alarm A01098 (Factory setting: 1)
Alarm for non synchronous time, e.g. after a longer power supply interruption.
0: No alarm
1: Alarm A01098
Converter with CU230P-2 Control Units
Operating Instructions, 04/2015, FW V4.7 SP3, A5E34257946B AB