If the x in 00x is 4, 5, 6 or 7, the time message from IRIG-B contains information of
the year. If x is 0, 1, 2 or 3, the information contains only the time within the year, and
year information has to come from the tool or local HMI.
The IRIG-B input also takes care of IEEE1344 messages that are sent by IRIG-B
clocks, as IRIG-B previously did not have any year information. IEEE1344 is
compatible with IRIG-B and contains year information and information of the time-zone.
It is recommended to use IEEE 1344 for supplying time information to the IRIG-B
module. In this case, send also the local time in the messages.
Synchronization via DNP
The DNP3 communication can be the source for the coarse time synchronization, while
the fine time synchronization needs a source with higher accuracy. See the
communication protocol manual for a detailed description of the DNP3 protocol.
Synchronization via IEC60870-5-103
The IEC60870-5-103 communication can be the source for the coarse time
synchronization, while the fine tuning of the time synchronization needs a source with
higher accuracy. See the communication protocol manual for a detailed description of
the IEC60870-5-103 protocol.
15.2.9
Technical data
Table 330:
Time synchronization, time tagging
Function
Value
Time tagging resolution, events and sampled measurement values
1 ms
Time tagging error with synchronization once/min (minute pulse
synchronization), events and sampled measurement values
± 1.0 ms typically
Time tagging error with SNTP synchronization, sampled measurement
values
± 1.0 ms typically
15.3
Parameter setting group handling
15.3.1
Functionality
Use the four different groups of settings to optimize the IED operation for different
power system conditions. Creating and switching between fine-tuned setting sets,
either from the local HMI or configurable binary inputs, results in a highly adaptable
IED that can cope with a variety of power system scenarios.
Section 15
1MRK 505 277-UUS C
Basic IED functions
388
Technical Manual
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