GE Multilin
C70 Capacitor Bank Protection and Control System
5-33
5 SETTINGS
5.2 PRODUCT SETUP
5
The C70 supports the IEC 60870-5-104 protocol. The C70 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 C70 maintains two sets of IEC
60870-5-104 data change buffers, no more than two masters should actively communicate with the C70 at one time.
The
IEC ------- DEFAULT THRESHOLD
settings are used to determine when to trigger spontaneous responses containing
M_ME_NC_1 analog data. These settings group the C70 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 C70 when any current values change by 15 A, the
IEC CURRENT DEFAULT THRESHOLD
set-
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 C70, the default thresholds will be in effect.
The C70 relay does not support energy metering. As such, the
IEC ENERGY DEFAULT THRESHOLD
setting is not appli-
cable.
The IEC 60870-5-104 and DNP protocols cannot be used simultaneously. When the
IEC 60870-5-104 FUNCTION
setting is set to “Enabled”, the DNP protocol will not be operational. When this setting is changed it will not
become active until power to the relay has been cycled (off-to-on).
k) SNTP PROTOCOL
PATH: SETTINGS
Ö
PRODUCT SETUP
ÖØ
COMMUNICATIONS
ÖØ
SNTP PROTOCOL
The C70 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the C70 can obtain clock time
over an Ethernet network. The C70 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 C70 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 C70 clock value cannot be changed using the front panel keypad.
To use SNTP in unicast mode,
SNTP SERVER IP ADDR
must be set to the SNTP/NTP server IP address. Once this address is
set and
SNTP FUNCTION
is “Enabled”, the C70 attempts to obtain time values from the SNTP/NTP server. Since many time
values are obtained and averaged, it generally takes three to four minutes until the C70 clock is closely synchronized with
the SNTP/NTP server. It may take up to two minutes for the C70 to signal an SNTP self-test error if the server is offline.
To use SNTP in broadcast mode, set the
SNTP SERVER IP ADDR
setting to “0.0.0.0” and
SNTP FUNCTION
to “Enabled”. The
C70 then listens to SNTP messages sent to the “all ones” broadcast address for the subnet. The C70 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
Ö
PRODUCT SETUP
ÖØ
COMMUNICATIONS
ÖØ
EGD PROTOCOL
SNTP PROTOCOL
SNTP FUNCTION:
Disabled
Range: Enabled, Disabled
MESSAGE
SNTP SERVER IP ADDR:
0.0.0.0
Range: Standard IP address format
MESSAGE
SNTP UDP PORT
NUMBER: 123
Range: 0 to 65535 in steps of 1
EGD PROTOCOL
FAST PROD EXCH 1
CONFIGURATION
MESSAGE
SLOW PROD EXCH 1
CONFIGURATION
MESSAGE
SLOW PROD EXCH 2
CONFIGURATION
NOTE
NOTE
Summary of Contents for UR Series C70
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