Siemens Argus 7SR22 - Page 394

7SR220 Technical Manual
Chapter 4 - Page 14 of 96 © 2017 Siemens Protection Devices Limited
Setting Name Range/Options Default Setting Notes
COM3
Protocol
OFF
IEC60870-5-103
MODBUS-RTU
DNP3
IEC60870-5-103
The protocol used
to communicate on
the standard RS485
connection.
COM3
Station
Address
0 - 254 for IEC60870-5-103
1 - 247 for Modbus RTU
0 - 65534 for DNP3.0
0
An address within the
range of the relevant
protocol must be
given to identify the
relay. Each relay in a
network must have a
unique address.
75 110 150 300
19200
The baud rate set
on all of the relays
COM3 600 1200 2400 4800
connected to the
control system must
Baud Rate
9600 19200 38400
be the same as the
57600 115200 one set on the master
device.
The parity set on
all of the relays
COM3
NONE
ODD
EVEN
connected to the
control system must
Parity
EVEN
be the same and in
accordance with the
master device.
COM3
Line Idle
LIGHT ON
LIGHT OFF
LIGHT OFF LIGHT OFF
Not applicable for
RS 485 or RS 232
option, set to OFF.
COM3
Data Echo
#1
ON
OFF
OFF OFF
Not applicable for
RS 485 or RS 232
option, set to OFF.
COM3
Mode
Local
Local or Remote
Remote
Remote
Refer to Appendix
1, page 95, for
further explanation
Fig. 2-5 Additional (Optional) Rear RS485 + IRIG-B Connection to a PC
2.6 Optional Rear RS232 (COM3)
The following settings, on the COMMUNICATIONS MENU, must be configured when using the electrical RS232
Com3 interface.
7SR24
COMMS MODULE
IRIG-B
RS485
Screened
twisted pair
COM3
GND
TERM
USB
or
9
pin
male
D connector
B
A
Laptop
computer
RS232
straight
through cable