7SR18 Configuration Guide
Unrestricted Page 10 of 12 © 2015 Siemens Protection Devices Limited
3.1.4 Configuring Relay Data Communication
Using the keys on the relay fascia scroll down the settings menu’s into the ‘communications’ menu and change
the settings for the communication port used on the relay. All of the below settings may not be available in all
relay types. Reydisp Evolution software uses IEC60870-5-103 protocol to communicate.
COM1 – Standard RS485 Rear Port
COM2 - USB Port
LAN – Optional Ethernet Ports
Setting name Range Default Notes
Station Address
1 – 254 for IEC60870-5-103
0 – 247 for Modbus RTU
0 – 65520 for DNP3.0
0
Address given to relay to
identify that relay from
others which may be using
the same path for
communication as other
relays for example in a fibre
optic hub
COM1-RS485 Protocol
OFF, IEC60870-5-103,
MODBUS-RTU, DNP3.0
IEC60870-5-
103
COM1 is the rear mounted
RS485 port
COM1-RS485 Baud
Rate
75 110 150 300 600 1200
2400 4800 9600 19200
38400
19200
COM1-RS485 Parity
NONE, ODD, EVEN EVEN
COM2-USB Protocol
OFF, IEC60870-5-103,
DNP3.0, MODBUS-RTU,
ASCII
IEC60870-5-
103
COM2 is the front USB port
COM2-USB Baud Rate
75 110 150 300 600 1200
2400 4800 9600 19200
38400 57600 115200
230400 460800 921600
Auto detects
Auto detects baud rate via
Connection Manager Setting
COM2-USB Parity
NONE, ODD, EVEN EVEN
3.1.5 Configuring Relay Protection Communication Address.
Using the keys on the relay fascia scroll down the ‘Settings’ menu into the ‘Prot’n Comms’ menu and ‘Protection
Comms’ sub-menu to change the ‘Prot’n Address’. The sum of the addresses of both relays must add to 255. This
number must be divided between the relays typically as e.g. 1 & 254 or 2 & 253 or 3 & 252... etc.
Setting name Range Default Notes
Protection Address
1 – 254 0
Different address could
signify Local or Remote
relay designation.
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