GE L90 Instruction Manual page 183

5 SETTINGS
k) SNTP PROTOCOL
PATH: SETTINGS PRODUCT SETUP
SNTP PROTOCOL
MESSAGE
MESSAGE
The L90 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the L90 can obtain clock time over
an Ethernet network. The L90 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 L90 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 L90 clock value cannot be changed using the front panel keypad.
To use SNTP in unicast mode,
set and is "Enabled", the L90 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 L90 clock is closely synchronized with
the SNTP/NTP server. It may take up to two minutes for the L90 to signal an SNTP self-test error if the server is offline.
To use SNTP in broadcast mode, set the
L90 then listens to SNTP messages sent to the "all ones" broadcast address for the subnet. The L90 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.
l) ETHERNET SWITCH
PATH: SETTINGS PRODUCT SETUP
ETHERNET SWITCH
MESSAGE
MESSAGE
MESSAGE
MESSAGE
These settings appear only if the L90 is ordered with an Ethernet switch module (type 2S or 2T).
The IP address and Modbus TCP port number for the Ethernet switch module are specified in this menu. These settings
are used in advanced network configurations. Please consult the network administrator before making changes to these
settings. The client software (EnerVista UR Setup, for example) is the preferred interface to configure these settings.
The through
PORT 1 EVENTS
recorder.
GE Multilin
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
COMMUNICATIONS
SWITCH IP ADDRESS:
127.0.0.1
SWITCH MODBUS TCP
PORT NUMBER: 502
PORT 1 EVENTS:
Disabled
PORT 2 EVENTS:
Disabled
PORT 6 EVENTS:
Disabled
settings allow Ethernet switch module events to be logged in the event
PORT 6 EVENTS
L90 Line Current Differential System
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
ETHERNET SWITCH
Range: standard IP address format
Range: 1 to 65535 in steps of 1
Range: Enabled, Disabled
Range: Enabled, Disabled
Range: Enabled, Disabled
5.2 PRODUCT SETUP
to "Enabled". The
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