Section 2: Physical Connection; Communication Ports; Dnp 3.0 Settings - Siemens 7SR224 Technical Manual

Section 2: Physical Connection

The relay range provides one 'Front' USB communication interface (Com2) located on the fascia and one RS485
(Com1) located on the 'Rear' with optional Fibre optic, RS232 and additional RS485 ports also located on the
rear. Access to the communication settings for the USB port is only available from the relay front fascia via the
key pad setting menu COMMUNICATIONS MENU. The communication settings for the other ports are available
from the relay front fascia via the key pad setting menu or through Reydisp via the USB connection.
1. Com2-USB: this port is used for IEC60870-5-103 (default setting) communication with the Reydisp
software. An ASCII protocol, the main use of which is to allow firmware to be updated from the front
connection, is also available through this port.
2. Com1-RS485: this port can be used for IEC60870-5-103, DNP-3, MODBUS RTU or IEC60870-5-101
communications to a substation SCADA or integrated control system or engineer remote access.
3. Com3/Com4: Optional RS232, dual fibre optic or additional RS485 ports located on the rear of the relay
can be used for IEC60870-5-103, DNP3, MODBUS RTU or IEC60870-5-101 communications to a
substation SCADA or integrated control system or engineer remote access.
Any or all ports can be mapped to the IEC60870-5-103, DNP3, MODBUS RTU or IEC60870-5-101 protocol at any
one time, protocols available will depend upon relay model.
Siemens Protection Devices Limited can provide a range of interface devices, please refer to product portfolio
catalogue.
Full details of the interface devices can be found by referring to the website www.siemens.com/energy.
2.1

Communication Ports

2.1.1

DNP 3.0 Settings

The following relay settings are provided for configuration of the DNP 3.0 implementation when available and are
common to all ports using this protocol.
Setting name Range
DISABLED ENABLED
Unsolicited Mode
0 ... 65534
Destination Address
DNP3 Application
5, 6 ... 299, 300
Timeout
©2010 Siemens Protection Devices Limited
Default Setting
DISABLED As Required
0 As Required
10s As Required
7SR224 Argus Data Comms
Notes
Setting is only visible when
a port Protocol is set to
DNP3
Setting is only visible when
a port Protocol is set to
DNP3
Setting is only visible when
a port Protocol is set to
DNP3
Chapter 4 Page 4 of 76