GE Multilin g60 Instruction Manual page 197

5 SETTINGS
k) SNTP PROTOCOL

PATH: SETTINGS PRODUCT SETUP
 SNTP PROTOCOL

MESSAGE
MESSAGE
The G60 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the G60 can obtain clock time
over an Ethernet network. The G60 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 G60 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 G60 clock value cannot be changed using the front panel keypad.
To use SNTP in unicast mode,
set and is "Enabled", the G60 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 G60 clock is closely synchronized with
the SNTP/NTP server. It may take up to two minutes for the G60 to signal an SNTP self-test error if the server is offline.
To use SNTP in broadcast mode, set the
G60 then listens to SNTP messages sent to the "all ones" broadcast address for the subnet. The G60 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) EGD PROTOCOL

PATH: SETTINGS PRODUCT SETUP
 EGD PROTOCOL

MESSAGE
MESSAGE
The G60 Generator Protection System is provided with optional Ethernet Global Data (EGD) communica-
tions capability. This feature is specified as a software option at the time of ordering. Refer to the Ordering
section of chapter 2 for additional details. The Ethernet Global Data (EGD) protocol feature is not available
if CPU Type E is ordered.
The relay supports one fast Ethernet Global Data (EGD) exchange and two slow EGD exchanges. There are 20 data items
in the fast-produced EGD exchange and 50 data items in each slow-produced exchange.
Ethernet Global Data (EGD) is a suite of protocols used for the real-time transfer of data for display and control purposes.
The relay can be configured to 'produce' EGD data exchanges, and other devices can be configured to 'consume' EGD
data exchanges. The number of produced exchanges (up to three), the data items in each exchange (up to 50), and the
exchange production rate can be configured.
EGD cannot be used to transfer data between UR-series relays. The relay supports EGD production only. An EGD
exchange will not be transmitted unless the destination address is non-zero, and at least the first data item address is set to
a valid Modbus register address. Note that the default setting value of "0" is considered invalid.
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
 FAST PROD EXCH 1
 CONFIGURATION
 SLOW PROD EXCH 1
 CONFIGURATION
 SLOW PROD EXCH 2
 CONFIGURATION
G60 Generator Protection 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
EGD PROTOCOL
5.2 PRODUCT SETUP
to "Enabled". The
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