PIXIT for Time synchronisation model
ID
Ed
Description
Tm1
1
What time quality bits are supported (may be
set by the IED)
Tm2
1,2
Describe the behaviour when the time server(s)
ceases to respond
What is the time server lost detection time
How long does it take to take over the new time
Tm3
1,2
from time server
Tm4
1,2
When is the time quality bit "ClockFailure" set
Tm5
1,2
When is the time quality bit "Clock not
Synchronized" set
Tm6
-
Is the timestamp of a binary event adjusted to
the configured scan cycle
Tm7
1
Does the device support time zone and daylight
saving
Tm8
1,2
Which attributes of the SNTP response packet
are validated
Tm9
1,2
Do the COMTRADE files have local time or UTC
time and is this configurable
<additional items>
Value / Clarification
Y LeapSecondsKnown
N ClockFailure
Y ClockNotSynchronized
Wait for a configurable number of
connection retries (unicast mode) or
wait a configurable period of time
(multicast mode). After that "Clock-
not-synchronized" will be set.
Configurable
Configurable
N/A
When connection to all time servers
are lost (see PIXIT-Tm2)
Deprecated
Y
Y
Leap indicator not equal to 3
N
Mode is equal to SERVER
N
OriginateTimestamp is equal
to value sent by the SNTP
client as Transmit
Timestamp
N
RX/TX timestamp fields are
checked for reasonableness
Y
SNTP version 3 and/or 4
N
other (describe)
Local Time
Not configurable
15
Capítulos
