Modbus User Map - GE B90 Instruction Manual

5 SETTINGS
The B90 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
become active until power to the relay has been cycled (off-to-on).
NOTE
k) SNTP PROTOCOL

PATH: SETTINGS PRODUCT SETUP
 SNTP PROTOCOL

MESSAGE
MESSAGE
The B90 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the B90 can obtain clock time
over an Ethernet network. The B90 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 B90 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 B90 clock value cannot be changed using the front panel keypad.
To use SNTP in unicast mode,
set and is "Enabled", the B90 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 B90 clock is closely synchronized with
the SNTP/NTP server. It may take up to two minutes for the B90 to signal an SNTP self-test error if the server is offline.
To use SNTP in broadcast mode, set the
B90 then listens to SNTP messages sent to the "all ones" broadcast address for the subnet. The B90 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

MESSAGE
MESSAGE
The Modbus user map provides read-only access for up to 256 registers. To obtain a memory map value, enter the desired
address in the line (this value must be converted from hex to decimal format). The corresponding value is dis-
ADDRESS
played in the line. A value of "0" in subsequent register
VALUE
lines incremented by "1". An address value of "0" in the initial register means "none" and values of "0" will be dis-
ADDRESS
played for all registers. Different
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


MODBUS USER MAP

ADDRESS 1:
VALUE: 0
ADDRESS 2:
VALUE: 0
↓
ADDRESS 256:
VALUE: 0
values can be entered as required in any of the register positions.
ADDRESS
B90 Low Impedance Bus Differential 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
Range: 0 to 65535 in steps of 1
0
Range: 0 to 65535 in steps of 1
0
Range: 0 to 65535 in steps of 1
0
lines automatically returns values for the previous
ADDRESS
5.2 PRODUCT SETUP
setting is not appli-
IEC 60870-5-104 FUNCTION
to "Enabled". The
5.2.6 MODBUS USER MAP
5-29
5