Date And Time Synchronization; Overview Of Functions; Structure Of The Function; Function Description - Siemens SIPROTEC 5 Manual

System Functions

3.4 Date and Time Synchronization

3.4 Date and Time Synchronization

Overview of Functions

3.4.1
Timely recording of process data requires precise time synchronization of the devices. The integrated date/
time synchronization allows the exact chronological assignment of events to an internally managed device
time that is used to time stamp events in logs, which are then transmitted to a substation automation tech-
nology . A clock module internal to the device and having battery backup is synchronized cyclically with the
current device time so that the right device time is available and used even in case of auxiliary-voltage failure.
At the same time, this permits hardware-supported monitoring of the device time.

Structure of the Function

3.4.2
The integrated date/time synchronization is a supervisory device function. Setting parameters and indications
can be found in the following menus for the DIGSI and the device:
Set date and time:
•
DIGSI: Online access -> Interface -> Device -> Device Information -> Time Information
•
Device: Main menu → Device functions → Date & Time
Parameter:
•
DIGSI: Project -> Device -> Parameter -> Time Settings
Indications:
•
DIGSI: Project -> Device -> Information routing ->Time keeping or Time Sync.
3.4.3

Function Description

Every SIPROTEC 5 device maintains an internal device time with date. The date and time can also be set on the
device via the on-site operation panel or via DIGSI 5. Within a system, or even beyond, it is usually necessary to
record the time of process data accurately and to have exact time synchronization of all devices. For SIPROTEC
5 devices, the sources of time and synchronization options can be configured.
Adjustable Synchronization Options
•
None (default setting)
The device functions without any external time synchronization. The internal time synchronization
continues to work with the help of the back-up battery even when the auxiliary voltage is shut down
temporarily. The time can be adjusted manually.
•
Telegram
The time is synchronized via a telegram with an appropriately configured communication interface in
accordance with the IEC 60870-5-103 or DNP3 protocol.
•
Connection to a GPS time synchronization unit
The time synchronization takes place with the set time telegram from an external IRIG-B or DCF77
receiver via the time synchronization interface of the device.
•
Ethernet
The time synchronization is done via Ethernet-based SNTP protocol (Simple Network Time Protocol), for
example with IEC 61850 stations. If you enable both services during configuration of Ethernet interfaces,
these protocols are available as an option for the time synchronization.
82 SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017