IEEE C37.238
grandmaster ID
Displays the grandmaster identity of
OTMC 100
to be transmitted in
IEEE C37.238 TLV. By sending this ID,
OTMC 100
identifies itself as a
valid Power profile grandmaster. A Power profile slave will ignore all
masters that do not provide a setting for this field.
Only available for PTP
profiles Power (C37.238-2011) and Power (C37.238-2017) (OTMC 100p
only).
This parameter is set in the
7.2.2.3
Parent pane
The
Parent
pane displays information about the current grandmaster of the network/domain in which
OTMC 100
operates. If
OTMC 100
is currently the master of the network or domain, the values given
here are identical to the values in the
(see page 42). Otherwise, information about the
respective grandmaster clock is given here. The data corresponds to the Parent Dataset specified by
IEEE 1588-2008, clause 8.2.3.
Port identity
Displays the port identity. This parameter states the port identity of
OTMC 100
as defined by IEEE 1588-2008, clause 7.5.2, in the format
portNumber@clockIdentity.
Grandmaster identity
Displays the grandmaster identity. This is the unique identifier of the
clock that is currently the grandmaster clock of the network or domain in
which
OTMC 100
participates.
Grandmaster clock class
Displays the grandmaster clock class. This parameter specifies the
current clock class of the current grandmaster clock in the network or
domain (see IEEE 1588-2008, clause 7.6.2.4). The value of the
Grandmaster clock class parameter is automatically set by the current
grandmaster clock depending on the source of time that is currently
available.
Grandmaster clock
accuracy
Displays the current accuracy of the internal clock of the current
grandmaster clock with regard to TAI. See IEEE 1588-2008, clause
7.6.2.5 for details.
Grandmaster clock
variance
Displays the grandmaster clock variance. The Grandmaster clock
variance parameter is set to the PTP variance value specified by IEEE
1588-2008, clause 7.6.3. This parameter gives a measure for the
stability of the internal oscillator of the current grandmaster clock and is
used in the Best Master Clock Algorithm (BMCA) of the PTP protocol.
Grandmaster priority 1
Grandmaster priority 2
Displays the priority 1 and 2 of the current grandmaster clock. If more
than one PTP grandmaster clock is available in the network, a clock with
a lower Priority 1 value will always be the preferred master clock over a
clock with a higher Priority 1 value (see IEEE 1588-2008, clause
6.6.2.3). A value in the range from 0 to 255 may be assigned to the
Priority 1 parameter (see IEEE 1588-2008, clause 7.6.2.2).
The Priority 2 parameter (see IEEE 1588-2008, clause 7.6.2.3) is used if
several devices have the same Priority 1 parameter value and the same
clock quality (class, accuracy and variance). The Priority 2 parameter
thus allows a finer grained ordering among otherwise equivalent clocks
(see IEEE 1588-2008, clause 6.6.2.3). Lower values take precedence.
OTMC 100 Series User Manual
44
OMICRON
