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5 SETTINGS
The Modbus user map provides read-only access for up to 256 registers. To obtain a memory map value, enter the desired
address in the
line (converted from hex to decimal format). The corresponding value displays in the
ADDRESS
value of "0" in subsequent register
by "1". An address value of "0" in the initial register means "none" and values of "0" display for all registers. Different
values can be entered as required in any of the register positions.
ADDRESS
a) MAIN MENU
PATH: SETTINGS
PRODUCT SETUP
REAL TIME
CLOCK
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
The relay contains a real time clock (RTC) to create timestamps for communications protocols as well as for historical data,
such as event records and oscillography. When the relay restarts, the RTC initializes from an onboard battery-backed
clock, which has the same accuracy as an electronic watch, approximately ±1 minute per month (~23 ppm). Once the RTC
is synchronized with the Precision Time Protocol (PTP), IRIG-B, or SNTP, its accuracy approaches that of the synchroniz-
ing time delivered to the relay.
The
SYNCHRONIZING SOURCE
able external time sources synchronizes the RTC and the synchrophasor clock. A setting of None causes the RTC and the
synchrophasor clock to free-run. A setting of PP/IRIGB/PTP/SNTP, IRIGB/PP/PTP/SNTP, or PP/PTP/IRIGB/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, 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.
See the
COMMANDS
SET DATE AND TIME
The
REAL TIME CLOCK EVENTS
records the RTC time before the adjustment.
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.
GE Multilin
lines automatically returns values for the previous
ADDRESS
REAL TIME CLOCK
SYNCRONIZING SOURCE:
None
REAL TIME CLOCK
EVENTS: Disabled
IRIG-B SIGNAL TYPE:
None
PRECISION TIME
PROTOCOL (1588)
SNTP PROTOCOL
LOCAL TIME
setting configures the priority sequence that the relay uses to determine which of the avail-
menu section of this manual to manually set the RTC.
setting allows changes to the date and/or time to be captured in the event record. The event
IRIG-B SIGNAL TYPE
D30 Line Distance Protection System
Range: None, PP/IRIG-B/PTP/SNTP, IRIG-B/PP/PTP/
SNTP, PP/PTP/IRIG-B/SNTP
Range: Enabled, Disabled
Range: None, DC Shift, Amplitude Modulated
See below
See below
See below
must be set to DC Shift or Amplitude Modulated. IRIG-B
5.2 PRODUCT SETUP
line. A
VALUE
lines incremented
ADDRESS
5.2.6 REAL TIME CLOCK
5-47
5
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