GE D30 Instruction Manual page 168

5.2 PRODUCT SETUP
The IEC 60870-5-104 and DNP protocols cannot be used simultaneously. When the
setting is set to "Enabled", the DNP protocol will not be operational. When this setting is changed it will not
NOTE
become active until power to the relay has been cycled (off-to-on).
k) SNTP PROTOCOL

PATH: SETTINGS PRODUCT SETUP
 SNTP PROTOCOL

The D30 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the D30 can obtain clock time
over an Ethernet network. The D30 acts as an SNTP client to receive time values from an SNTP/NTP server, usually a ded-
icated 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 D30 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 D30 clock value cannot be changed using the front panel keypad.
To use SNTP in unicast mode,
set and
SNTP FUNCTION
values are obtained and averaged, it generally takes three to four minutes until the D30 clock is closely synchronized with
5
the SNTP/NTP server. It may take up to two minutes for the D30 to signal an SNTP self-test error if the server is offline.
To use SNTP in broadcast mode, set the
D30 then listens to SNTP messages sent to the "all ones" broadcast address for the subnet. The D30 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

These settings appear only if the D30 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.
5-36

COMMUNICATIONS
SNTP FUNCTION:
Disabled
SNTP SERVER IP ADDR:
MESSAGE
0.0.0.0
SNTP UDP PORT
MESSAGE
NUMBER: 123
SNTP SERVER IP ADDR
is "Enabled", the D30 attempts to obtain time values from the SNTP/NTP server. Since many time
SNTP SERVER IP ADDR

COMMUNICATIONS
SWITCH IP ADDRESS:
127.0.0.1
SWITCH MODBUS TCP
MESSAGE
PORT NUMBER: 502
PORT 1 EVENTS:
MESSAGE
Disabled
PORT 2 EVENTS:
MESSAGE
Disabled
PORT 6 EVENTS:
MESSAGE
Disabled
settings allow Ethernet switch module events to be logged in the event
PORT 6 EVENTS
D30 Line Distance Protection System

SNTP PROTOCOL
Range: Enabled, Disabled
Range: Standard IP address format
Range: 0 to 65535 in steps of 1
must be set to the SNTP/NTP server IP address. Once this address is
setting to "0.0.0.0" and

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 SETTINGS
IEC 60870-5-104 FUNCTION
to "Enabled". The
SNTP FUNCTION
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