Section 2: Physical Connection; Introduction; Usb Interface - Siemens 7SR45 Argus User Manual

Section 2:
Physical Connection
2.1

Introduction

The relay provides one "Front" USB communication interface located on the fascia and one RS485
located on the "Rear" as standard.
A detailed description of the ports are given below.
RS485:
USB:
Any or all serial ports can be mapped to the IEC60870-5-103 or MODBUS-RTU protocol at any one
time, protocols available will depend upon relay model.
When connecting to Reydisp Evolution software the protocol for the relevant port should be set to
IEC60870-5-103.
2.2

USB Interface

The USB communication port is connected using a standard USB cable with a type B connection to
the relay and type A to the PC.
The PC will require a suitable USB driver to be installed; this will be carried out automatically when the
Reydisp software is installed. When the Reydisp software is running with the USB cable connected to
a device an additional connection is shown. Connections to these devices are not shown when they
are not connected.
The USB communication interface on the relay and its associated settings are located in the Data
communications menu. When connecting to Reydisp using this connection the default settings can be
used without the need to first change any settings.
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.
Range/Options
Setting
Name
OFF
USB
IEC60870-5-103
Protocol
MODBUS-RTU
0 to 254 for IEC60870-5-103
USB
1 to 247 for Modbus RTU
Stn
Addr
USB Mode Local
Local or Remote
Remote
© 2018 Siemens Protection Devices Limited
This port can be used for IEC60870-5-103 and MODBUS-RTU communications
to a substation SCADA or integrated control system or for engineer remote
access. This port can also be used for connection to Reydisp software.
This port is used for IEC60870-5-103 (default setting) communication with the
Reydisp software.
Chapter 4 - 7SR45 Data Communications Definitions
Default Setting
IEC60870-5-103
1
Local or Remote
Notes
Reydisp software
requires IEC60870-5-
103
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.
Chapter 4 Page 4 of 20