ABB RELION SMU615 Technical Manual page 52

Basic functions
the frame format used is IEEE 802.3 Ethernet frames with 88F7 Ethertype as
communication service and the delay mechanism is P2P.
determines the format of PTP announce frames sent by the merging unit when
acting as 1588 master, with options "Basic IEEE1588" and "Power Profile". In the
"Power Profile" mode, the TLVs required by the IEEE C37.238-2011 Power Profile are
included in announce frames.
Time master supervision functionality is provided when the merging unit itself is
synchronized from an external source (master). The EXCLKMSTR output is activate
whenever the merging unit is configured with an external
synchronized by any external master. During the operation the ALARM and WARNING
outputs can be used to supervise the external masters. The WARNING output is
activated, if connection to the primary external master is lost. After losing the
connection to the primary master at first, the ALARM output is activated in case
no other acceptable master is found. The ALARM output can also be active, if the
master clock accuracy is not within the limits. The ALARM and WARNING outputs
are automatically deactivated, if the connection to the master is recovered. For
1588 systems, the time master supervision functionality also includes an automatic
learning feature based on the system devices' PTP priority. For example, if the
primary master device is replaced by a new device with a higher configured priority
compared to the original primary master device, the new device becomes the
new primary master. This also automatically deactivates the WARNING and ALARM
outputs. The
Configuration > Time > Synchronization in case the old stored masters should be
manually cleared.
3.4.1.3 Signals
GNRLLTMS output signals
Table 23: GNRLLTMS output signals
Name
ALARM
WARNING
EXCLKMSTR
3.4.1.4 Settings
Table 24: Time format
Parameter Values (Range)
Time format
1=24H:MM:SS:MS
2=12H:MM:SS:MS
Date format
1=DD.MM.YYYY
2=DD/MM/YYYY
3=DD-MM-YYYY
4=MM.DD.YYYY
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Clear clock list parameter is available via the HMI or PCM600 path
Type
BOOLEAN
BOOLEAN
BOOLEAN
Unit Step
1MRS758407 C
PTP announce mode
Synch source and
Description
Time synchronization alarm
Time synchronization warning
External Clock Master
Default Description
1=24H:MM:SS:MS Time format
1=DD.MM.YYYY Date format
Technical Manual
SMU615