GE t60 Instruction Manual page 166

5.2 PRODUCT SETUP
The T60 supports the IEC 60870-5-104 protocol. The T60 can be used as an IEC 60870-5-104 slave device connected to a
maximum of two masters (usually either an RTU or a SCADA master station). Since the T60 maintains two sets of IEC
60870-5-104 data change buffers, no more than two masters should actively communicate with the T60 at one time.
The
IEC ------- DEFAULT THRESHOLD
M_ME_NC_1 analog data. These settings group the T60 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 T60 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 T60, the default thresholds will be in effect.
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
5
The T60 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the T60 can obtain clock time over
an Ethernet network. The T60 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 T60 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 T60 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 T60 clock is closely synchronized with
the SNTP/NTP server. It may take up to two minutes for the T60 to signal an SNTP self-test error if the server is offline.
To use SNTP in broadcast mode, set the
T60 then listens to SNTP messages sent to the "all ones" broadcast address for the subnet. The T60 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
The T60 Transformer Protection System is provided with optional Ethernet Global Data (EGD) communi-
cations capability. This feature is specified as a software option at the time of ordering. Refer to the Order-
ing section of chapter 2 for additional details. The Ethernet Global Data (EGD) protocol feature is not
available if CPU Type E is ordered.
5-34
settings are used to determine when to trigger spontaneous responses containing
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 T60 attempts to obtain time values from the SNTP/NTP server. Since many time
SNTP SERVER IP ADDR
COMMUNICATIONS
FAST PROD EXCH 1
CONFIGURATION
SLOW PROD EXCH 1
MESSAGE
CONFIGURATION
SLOW PROD EXCH 2
MESSAGE
CONFIGURATION
T60 Transformer 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
EGD PROTOCOL
5 SETTINGS
IEC CURRENT DEFAULT THRESHOLD
IEC 60870-5-104 FUNCTION
to "Enabled". The
SNTP FUNCTION
GE Multilin
set-