7SR220 Technical Manual
Chapter 4 - Page 12 of 96 © 2017 Siemens Protection Devices Limited
Setting Name Range/Options Default Setting Notes
COM3
Line Idle
LIGHT ON
LIGHT OFF
LIGHT OFF
Sets the fibre optic
line idle state.
COM3
Data Echo
#1
ON
OFF
OFF
Set to ON when
relays are connected
in a fibre-optic ring
configuration.
COM3
Mode
Local
Local or Remote
Remote
Remote
Refer to Appendix
1, page 95, for
further explanation
The following settings, on the COMMUNICATIONS MENU, must be configured when using the fibre Optic Com4
interface
COM4
Data Echo
#1
ON
OFF
COM4
Mode
Local
Local or Remote
Remote
#1 In ring mode, echo = on, the whole fibre optic data comms link will be interrupted if the relay element is withdrawn
from the case.
Setting Name Range/Options Default Setting Notes
COM4
Protocol
OFF
IEC60870-5-103
MODBUS-RTU
DNP3
IEC60870-5-103
The protocol used
to communicate on
the standard RS485
connection.
COM4 0 - 254 for IEC60870-5-103
0
An address within the
protocol must be
Station 1 - 247 for Modbus RTU
given to identify the
Address 0 - 65534 for DNP3.0
network must have a
unique address.
The baud rate set
COM4
19200
connected to the
control system must
9600 19200 38400
be the same as the
one set on the master
device.
COM4
Parity
NONE
ODD
EVEN
EVEN
The parity set on
all of the relays
connected to the
control system must
be the same and in
accordance with the
master device.
COM4
Line Idle
LIGHT ON
LIGHT OFF
LIGHT OFF
Sets the fibre optic
line idle state.
OFF
Remote
Set to ON when
relays are connected
in a fibre-optic ring
configuration.
Refer to Appendix
1, page 95, for
further explanation
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