General; Internal Time Keeping; Time Format; Status Bits - Siemens SICAM Q100 7KG95 Series Manual

11 Time Synchronization

11.1 General

11.1 General
During operation, SICAM Q100 needs the date and time for all time-relevant processes. The term time is used
throughout this section to refer to both the date and the time.
The time synchronization in the SICAM Q100 is necessary to guarantee a common time basis for the commu-
nication with peripheral devices and time stamping of the process data.
SICAM Q100 supports both external and internal time synchronization. The type of time synchronization is
specified during the parameterization (see chapter 9.3.7.1). The external time synchronization from an NTP
server is preferred.
11.2

Internal Time Keeping

11.2.1

Time Format

The internal time is kept in UTC (Universal Time Coordinated) from 01.01.2000, 00:00 to 31.12.2099, 23:59.
To display the local time, for example on the HTML pages, you can configure a local time correction factor and
the automatic adjustment to daylight saving time during parameterization (see chapter 9.3.7.1).
11.2.2

Status Bits

FAIL Status Bit
The FAIL status bit implemented in the SICAM Q100 signals with "0" that the time is valid and with "1" that the
time is invalid.
The status of the FAIL bit corresponds to the "Clock error" operational indication, see chapter 14.1.
The following table lists the time stamps of events or indications for the displayed operational, error logs, and
audit logs according to status bit set/not set using the example of date 2010-09-26, time 13:49.35246:
Tabelle 11-1 FAIL Status Bit for Time Synchronization via NTP Server
FAIL
0
1
DST Status Bit
With "1", the DST status bit implemented in the SICAM Q100 signals that the local daylight saving time is active.
The operational indication "Daylight saving time" is displayed.
362
2010-09-26 13:49.35:246
2010-09-26 13?49?35?246
Output
SICAM Q100, 7KG95xx, Device Manual
E50417-H1040-C522-A6, Edition 06.2019