GE C30 Instruction Manual page 157

5 SETTINGS
The C30 relay does not support energy metering. As such, the
cable.
NOTE
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

MESSAGE
MESSAGE
The C30 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the C30 can obtain clock time
over an Ethernet network. The C30 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 C30 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 C30 clock value cannot be changed using the front panel keypad.
To use SNTP in unicast mode,
set and is "Enabled", the C30 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 C30 clock is closely synchronized with
the SNTP/NTP server. It may take up to two minutes for the C30 to signal an SNTP self-test error if the server is offline.
To use SNTP in broadcast mode, set the
C30 then listens to SNTP messages sent to the "all ones" broadcast address for the subnet. The C30 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 C30 Controller System is provided with optional Ethernet Global Data (EGD) communications capa-
bility. 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.
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
C30 Controller System
IEC ENERGY 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
EGD PROTOCOL
5.2 PRODUCT SETUP
setting is not appli-
IEC 60870-5-104 FUNCTION
5
to "Enabled". The
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