Modbus User Map - GE L90 Instruction Manual

5.2 PRODUCT SETUP
The L90 supports the IEC 60870-5-104 protocol. The L90 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 L90 maintains two sets of IEC
60870-5-104 data change buffers, no more than two masters should actively communicate with the L90 at one time.
The
NUMBER OF SOURCES IN MMENC1 LIST
are included in the M_ME_NC_1 (measured value, short floating point) Analog points list. This allows the list to be custom-
ized to contain data for only the sources that are configured.
The
IEC ------- DEFAULT THRESHOLD
responses containing M_ME_NC_1 analog data. These settings group the UR 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, in order to trigger spontaneous responses from the UR when any current values change by 15 A, the
IEC CURRENT DEFAULT THRESHOLD
bands. P_ME_NC_1 (Parameter of measured value, short floating point value) points can be used to change threshold val-
ues, from the default, for each individual M_ME_NC_1 analog point. Whenever power is removed and re-applied to the UR,
the default thresholds will be in effect.
The IEC 60870-5-104 and DNP protocols can not be used at the same time. When the
setting is set to "Enabled", the DNP protocol will not be operational. When this setting is changed it
TION
will not become active until power to the relay has been cycled (Off/On).
NOTE
j) SNTP PROTOCOL
!
PATH: SETTINGS PRODUCT SETUP
# SNTP PROTOCOL
#
5
The L90 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the L90 can obtain clock time over
an Ethernet network. The L90 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 L90 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 L90 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 L90 clock is closely synchronized with
the SNTP/NTP server. It may take up to one minute for the L90 to signal an SNTP self-test error if the server is offline.
To use SNTP in broadcast mode, set the
L90 then listens to SNTP messages sent to the "all ones" broadcast address for the subnet. The L90 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.
!
PATH: SETTINGS PRODUCT SETUP

# MODBUS USER MAP

#
5-18
setting allows the selection of the number of current/voltage source values that
settings are the values used by the UR to determine when to trigger spontaneous
setting should be set to 15. Note that these settings are the default values of the dead-
!"
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 L90 attempts to obtain time values from the SNTP/NTP server. Since many time
SNTP SERVER IP ADDR
!"
MODBUS USER MAP
ADDRESS
VALUE:
ADDRESS 256:
MESSAGE
VALUE:
L90 Line Differential Relay
!"
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
Range: 0 to 65535 in steps of 1
1: 0
0
↓
Range: 0 to 65535 in steps of 1
0
0
5 SETTINGS
IEC 60870-5-104 FUNC-
to "Enabled". The
SNTP FUNCTION
5.2.5 MODBUS USER MAP
GE Multilin