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GE L60 Instruction Manual Page 175

Line phase comparison system, ur series.
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5 SETTINGS
The
IEC ------- DEFAULT THRESHOLD
M_ME_NC_1 analog data. These settings group the L60 analog data into types: current, voltage, power, energy, and other.
Each setting represents the default threshold value for all M_ME_NC_1 analog points of that type. For example, to trigger
spontaneous responses from the L60 when any current values change by 15 A, the
ting should be set to 15. Note that these settings are the default values of the deadbands. P_ME_NC_1 (parameter of mea-
sured value, short floating point value) points can be used to change threshold values, from the default, for each individual
M_ME_NC_1 analog point. Whenever power is removed and re-applied to the L60, the default thresholds will be in effect.
The
setting decides whether multiple client connections are accepted or not. If redundancy is set to Yes,
IEC REDUNDANCY
two simultaneous connections can be active at any given time.
The IEC 60870-5-104 and DNP protocols cannot be used simultaneously. When the IEC 60870-5-104 FUNCTION
setting is set to "Enabled", the DNP protocol will not be operational. When this setting is changed it will not become
active until power to the relay has been cycled (off-to-on).
NOTE
k) SNTP PROTOCOL
PATH: SETTINGS
PRODUCT SETUP
 SNTP PROTOCOL
MESSAGE
MESSAGE
The L60 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the L60 can obtain clock time over
an Ethernet network. The L60 acts as an SNTP client to receive time values from an SNTP/NTP server, usually a dedicated
product using a GPS receiver to provide an accurate time. Both unicast and broadcast SNTP are supported.
If SNTP functionality is enabled at the same time as IRIG-B, the IRIG-B signal provides the time value to the L60 clock for
as long as a valid signal is present. If the IRIG-B signal is removed, the time obtained from the SNTP server is used. If
either SNTP or IRIG-B is enabled, the L60 clock value cannot be changed using the front panel keypad.
To use SNTP in unicast mode,
set and
is "Enabled", the L60 attempts to obtain time values from the SNTP/NTP server. Since many time
SNTP FUNCTION
values are obtained and averaged, it generally takes three to four minutes until the L60 clock is closely synchronized with
the SNTP/NTP server. It may take up to two minutes for the L60 to signal an SNTP self-test error if the server is offline.
To use SNTP in broadcast mode, set the
L60 then listens to SNTP messages sent to the "all ones" broadcast address for the subnet. The L60 waits up to eighteen
minutes (>1024 seconds) without receiving an SNTP broadcast message before signaling an SNTP self-test error.
The UR-series relays do not support the multicast or anycast SNTP functionality.
GE Multilin
settings are used to determine when to trigger spontaneous responses containing


COMMUNICATIONS
SNTP FUNCTION:
Disabled
SNTP SERVER IP ADDR:
0.0.0.0
SNTP UDP PORT
NUMBER: 123
must be set to the SNTP/NTP server IP address. Once this address is
SNTP SERVER IP ADDR
SNTP SERVER IP ADDR
L60 Line Phase Comparison System
IEC CURRENT DEFAULT THRESHOLD
SNTP PROTOCOL
Range: Enabled, Disabled
Range: Standard IP address format
Range: 0 to 65535 in steps of 1
setting to "0.0.0.0" and
SNTP FUNCTION
5.2 PRODUCT SETUP
set-
5
to "Enabled". The
5-37

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