The IED supports SNTP, IRIG-B, DNP 3.0, Modbus and IEC 60870-5-103 to update
the real-time clock. IRIG-B with GPS provides the best accuracy.
With Modbus TCP or DNP 3.0 over TCP/IP, SNTP time
synchronization should be used for better synchronization accuracy.
When the SNTP server IP setting is changed, the IED must be
rebooted to activate the new IP address. The SNTP server IP settings
are normally defined in the engineering phase via the SCL file.
The IED can use one of two SNTP servers, the primary or the secondary server. The
primary server is mainly in use, whereas the secondary server is used if the primary
server cannot be reached. While using the secondary SNTP server, the IED tries to
switch back to the primary server on every third SNTP request attempt. If both the
SNTP servers are offline, event time stamps have the time invalid status. The time is
requested from the SNTP server every 60 seconds.
IRIG-B time synchronization requires the IRIG-B format B000/B001 with
IEEE-1344 extensions. The synchronization time can be either UTC time or local
time. As no reboot is necessary, the time synchronization starts immediately after the
IRIG-B sync source is selected and the IRIG-B signal source is connected.
ABB has tested the IRIG-B with the following clock masters:
• Tekron TTM01 GPS clock with IRIG-B output
• Meinberg TCG511 controlled by GPS167
• Datum ET6000L
• Arbiter Systems 1088B
IRIG-B time synchronization requires a COM card with an IRIG-B
input. The applicable COM card alternatives are COM0003,
COM0007, COM0011, COM0012, COM0013, COM0014 or
COM0023.
4.4 Parameter setting groups
There are four IED variant specific setting groups. For each setting group the
parameter setting can be made independently.
The active setting group (1...4) can be changed by parameter or via binary input, if a
binary input is enabled for it.
Section 4 1MRS756378 D
Basic functions
130 REF615
Application Manual
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