GE F60 Instruction Manual page 198

5.2 PRODUCT SETUP
changed from the front panel or from communications protocols. A setting of PP/IRIG-B/PTP/SNTP, IRIG-B/PP/PTP/SNTP,
or PP/PTP/IRIG-B/SNTP causes the relay to track the first source named that is enabled and operational, or free-run if
none of these are available. Here, PP means a time source that is strictly compliant with PP, and PTP means a time source
that is not strictly compliant with PP. When a time source fails or recovers, the relay automatically transfers synchronization
as required by this setting.
When the relay does not have the IEEE 1588 software option and this setting does not display, it uses IRIG-B when
enabled and operational
clock is changed from the front panel or from communications protocols.
Whenever a time synchronization message is received through any of the active protocols, the UR clock updates. However,
given that IEC 60870-5-103, IEC 60870-5-104, Modbus, and DNP are low accuracy time synchronization methods, avoid
their use for synchronization when better accuracy time protocols, such as IRIG-B and PTP, are active in the system. If
IRIG-B or PTP is used to update the relay clock, the other protocols (such as SNTP) are not allowed to update, even if
active.
See the 
COMMANDS
The
REAL TIME CLOCK EVENTS
records the RTC time before the adjustment. A Date/Time Changed event is generated when:
• The real time clock changed from SNTP/PTP/IRIG-B and the time difference is more than one second
• The real time clock changed from the front panel or via Modbus register. The relay always generates this event regard-
less of the time difference.
• The Daylight Saving Time (DST) setting gets enabled and the current relay time is already in the DST zone
• The real time clock enters or leaves DST
5
To enable IRIG-B synchronization, the input
synchronization can be disabled by making this setting None.
To configure and enable PTP and/or SNTP, or to set local time parameters (for example time zone, daylight savings), use
the following sections.
b) PRECISION TIME PROTOCOL (1588)

PATH: SETTINGS PRODUCT SETUP
 PRECISION TIME
 PROTOCOL (1588)

PATH: SETTINGS PRODUCT SETUP
5-66
, then failing that SNTP when configured and operational,
menu section of this manual to manually set the RTC.
SET DATE AND TIME
setting allows changes to the date and/or time to be captured in the event record. The event
IRIG-B SIGNAL TYPE

REAL TIME CLOCK
STRICT POWER PROFILE:
Disabled
PTP DOMAIN NUMBER
MESSAGE
0
PTP VLAN PRIORITY
MESSAGE
4
PTP VLAN ID
MESSAGE
0
 PTP PORT 1
MESSAGE


REAL TIME CLOCK
PORT 1 PTP FUNCTION:
MESSAGE
Disabled
PORT 1 PATH DELAY
MESSAGE
ADDER:
PORT 1 PATH DELAY
MESSAGE
ASYMMETRY:
F60 Feeder Protection System
and otherwise it free-runs unless the
must be set to DC Shift or Amplitude Modulated. IRIG-B

PRECISION TIME PROTOCOL (1588)
Range: Enabled, Disabled
Range: 0 to 255
Range: 0 to 7
Range: 0 to 4095

PRECISION TIME PROTOCOL (1588)
Range: Enabled, Disabled
Range: 0 to 60 000 ns in steps of 1
00000 ns
Range: –1 000 to +1 000 ns in steps of 1
0000 ns
5 SETTINGS

PTP PORT 1(3)
GE Multilin