Siemens 7XV5673 Device Manual page 181

Table 8-22
When is the time quality bit "Clock failure"
set?
When is the time quality bit "Clock not syn-
chronised" set?
Is the timestamp of a binary event adjusted to
the configured scan cycle?
Does the device support time zone and day-
light saving?
Which attibutes of the NTP response packet
are validated?
SICAM I/O Unit, 7XV5673, Device Manual
E50417-H1040-C484-A3, Edition 05.2012
PIXIT for Time and Time Syncronization Model (cont.)
Description Value/Clarification
At faulty internal clock or failure of the synchronization
source (SNTP, field bus) or RTC failure
After a waiting period, time quality is set to
ClockNotSynchronized and ClockFailure
No
Yes
Leap indicator not equal to 3?
Mode is equal to SERVER
OriginateTimestamp is equal to value
sent by the SNTP client as
TransmitTimestamp
RX/TX timestamp fields are checked for
reasonableness
SNTP version 3 and/or 4
Other (describe)
8 Communication
8.4 IEC 61850
Yes
No
No
Yes
No
No
181