Specifications

7SR242 Duobias Data Communications

Section 1: Introduction

The relay data communication facility is compatible with control and automation systems, PCs running Reydisp

software can provide operational information, post-fault analysis, settings interrogation and editing facilities. This

section describes how to use the Communication Interface with a control system or interrogating computer.

Appropriate software within the control system or on the interrogating computer (e.g. Reydisp Evolution) is

required to access the interface.

This section specifies connection details and lists the events, commands and measurands available in the

IEC60870-5-103, Modbus RTU and optional DNP3.0 protocols.

For further information regarding the IEC60870-5-103 interface, reference should be made to the separate

Informative Communications Interface manual (reference 434/TM/5 available from

www.siemens.com/energy

The Communications Interface for dialogue communications by the Protection Engineer is provided by the

Reydisp Evolution software package, also available from the website, using the IEC60870-5-103 protocol.