Specifications

7SR242 Duobias Data Communications
©2010 Siemens Protection Devices Limited Chapter 4 Page 2 of 43
Contents
Document Release History....................................................................................................................1
Software Revision History.....................................................................................................................1
Contents ..................................................................................................................................................2
Section 1: Introduction ..........................................................................................................................3
Section 2: Physical Connection............................................................................................................4
2.1 Communication ports ................................................................................................................5
2.1.1 USB Interface...............................................................................................................5
2.1.2 RS485 Interface ...........................................................................................................6
2.1.3 Fibre Optic Interface.....................................................................................................7
Section 3: IEC 60870-5-103 Definitions ..............................................................................................11
3.1 Introduction .............................................................................................................................11
Section 4: Modbus Definitions............................................................................................................18
4.1 Introduction .............................................................................................................................18
Event Format.........................................................................................................................................24
Section 5: DNP3.0 Definitions.............................................................................................................25
5.1 Device Profile..........................................................................................................................25
5.2 Implementation Table .............................................................................................................28
5.3 Point List .................................................................................................................................33
Section 6: Modems...............................................................................................................................41
6.1.1 Connecting a Modem to the Relay(s) ........................................................................41
6.1.2 Setting the Remote Modem .......................................................................................41
6.1.3 Connecting to the Remote Modem ............................................................................42
Section 7: Glossary..............................................................................................................................43
List of Figures
Figure 2-1 Communication to Front USB Port ......................................................................................5
Figure 2-2 Communication to Multiple Devices from Control System using RS485.............................6
Figure 2-3 Communication to Multiple Devices using Fibre-optic Ring Network ................................10
Figure 2-4 Communication to Multiple Devices from Control System and Laptop using
Fibre-optic Star Network ....................................................................................................10
Figure 6-1 Communication to Device using Sigma 4 and Modem......................................................42