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GE UR Series Instruction Manual Page 94

Line differential relay.
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5.2 PRODUCT SETUP
c) MODBUS PROTOCOL
Ö
PATH: SETTINGS
PRODUCT SETUP
COMMUNICATIONS
MODBUS PROTOCOL
MESSAGE
MESSAGE
The serial communication ports utilize the Modbus protocol, unless configured for DNP operation (see DNP PROTOCOL
below). This allows the URPC program to be used. UR relays operate as Modbus slave devices only. When using Modbus
protocol on the RS232 port, the L90 will respond regardless of the
ports each L90 must have a unique address from 1 to 254. Address 0 is the broadcast address which all Modbus slave
devices listen to. Addresses do not have to be sequential, but no two devices can have the same address or conflicts
resulting in errors will occur. Generally, each device added to the link should use the next higher address starting at 1.
Refer to Appendix B for more information on the Modbus protocol.
d) DNP PROTOCOL
Ö
PATH: SETTINGS
PRODUCT SETUP
COMMUNICATIONS
5
DNP PROTOCOL
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
5-10
ÖØ
ÖØ
COMMUNICATIONS
MODBUS SLAVE
ADDRESS: 254
MODBUS TCP PORT
NUMBER:
502
ÖØ
ÖØ
COMMUNICATIONS
DNP PORT:
NONE
DNP ADDRESS:
255
DNP NETWORK
CLIENT ADDRESSES
DNP TCP/UDP PORT
NUMBER: 20000
DNP UNSOL RESPONSE
FUNCTION: Disabled
DNP UNSOL RESPONSE
TIMEOUT: 5 s
DNP UNSOL RESPONSE
MAX RETRIES: 10
DNP UNSOL RESPONSE
DEST ADDRESS: 1
USER MAP FOR DNP
ANALOGS: Disabled
NUMBER OF SOURCES
IN ANALOG LIST: 1
L90 Line Differential Relay
MODBUS PROTOCOL
Range: 1 to 254 in steps of 1
Range: 1 to 65535 in steps of 1
MODBUS SLAVE ADDRESS
DNP PROTOCOL
Range: NONE, COM1 - RS485, COM2 - RS485, FRONT PANEL -
RS232, NETWORK
Range: 0 to 65519 in steps of 1
Note:
Press the MESSAGE
CLIENT ADDRESSES
Range: 1 to 65535 in steps of 1
Range: Enabled, Disabled
Range: 0 to 60 s in steps of 1
Range: 1 to 255 in steps of 1
Range: 0 to 65519 in steps of 1
Range: Enabled, Disabled
Range: 1 to 6 in steps of 1
5 SETTINGS
programmed. For the RS485
Ö
key to enter the DNP NETWORK
GE Power Management

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L90

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