Iec 60870-5-103 Definitions; Introduction - Siemens Argus 7SR21 Technical Manual

Chapter 4 - Data Communications Definitions

3. IEC 60870-5-103 Definitions

3.1 Introduction

This section describes the IEC 60870-5-103 protocol implementation in the relays. This protocol is used for the
communication with Reydisp software and can also be used for communication with a suitable control system.
The control system or local PC acts as the master in the system with the relay operating as a slave responding
to the master's commands. The implementation provides event information, time synchronising, commands and
measurands and also supports the transfer of disturbance records.
This protocol can be set to use any or all of the relays hardware interfaces (USB, Fibre Optic, RS232, RS485 and
Ethernet) where fitted and is the standard protocol used by the USB port. The relay can communicate simultaneously
on all ports regardless of protocol used.
The Station Address of the port being used must be set to a suitable address within the range 0 - 254 to enable
communication. This can be set by the Communications Menu : COM n-xxxxx Station Address setting.
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