7SR11 & 7SR12 Settings & Instruments Guide
Chapter 2 Page 18 of 20 ยฉ2017 Siemens Protection Devices Limited
2.1.4 Configuring Relay Serial Data Communication
Using the keys on the relay fascia scroll down the settings menus into the โcommunicationsโ menu and if
necessary change the settings for the communication port you are using on the relay. Reydisp software uses
IEC60870-5-103 protocol to communicate.
When connecting the relay to a pc using the front USB port, the Reydisp setting software will automatically detect
the relay without making any setting changes in the relay first as long as the USB is selected to IEC60870-5-103.
COM1-RS485 Port and COM2-USB Port
Description Range Default Notes
COM1-RS485 Protocol
Selects protocol to use for COM1-RS485
OFF, IEC60870-5-103,
MODBUS-RTU, DNP3
IEC60870-5-103
COM1-RS485 Station Address
IEC 60870-5-103 Station Address
0, 1 ... 65533, 65534 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 Baud Rate
Sets the communications baud rate for COM1-
RS485
75, 110, 150, 300, 600, 1200,
2400, 4800, 9600, 19200,
38400
19200 19200
COM1-RS485 Parity
Selects whether parity information is used
NONE, ODD, EVEN EVEN EVEN
COM1-RS485 Mode
Selects whether the port is Local or Remote.
Local, Remote, Local Or
Remote
Remote Remote
COM2-USB Protocol
Selects protocol to use for COM2-USB
OFF, DNP3, ASCII, MODBUS-
RTU, IEC60870-5-103
IEC60870-5-103
COM2-USB Station Address
IEC 60870-5-103 Station Address
0, 1 ... 65533, 65534 0
Address given to relay
to identify it for
connection to the USB
front port
COM2-USB Mode
Selects whether the port is Local or Remote.
Local, Remote, Local Or
Remote
Local Local
DNP3 Unsolicited Events
Allows unsolicited event support in the relay.
When Enabled, unsolicited event transmission
can be controlled by the Master. When
Disabled, Master requests are ignored.
Disabled, Enabled Disabled Disabled
DNP3 Destination Address
The address of the master to which unsolicited
events will be sent.
0, 1 ... 65533, 65534 0
This setting is only
visible when DNP3
Unsolicited Events is
Enabled
DNP3 Application Timeout
5, 6 ... 299, 300 10s 10s