Iec 60870-5-103 Communication Protocol; Application; Functionality; Design - Hitachi Relion 670 Series Applications Manual

1MRK511407-UUS Rev. N
19.6

IEC 60870-5-103 communication protocol

19.6.1

Application

IED
ANSI05000660 V4 EN-US
Figure 122:
IEC 60870-5-103 communication protocol is mainly used when a protection IED communicates with a
third party control or monitoring system. This system must have software that can interpret the IEC
60870-5-103 communication messages.
When communicating locally in the station using a Personal Computer (PC) or a Remote Terminal Unit
(RTU) connected to the Communication and processing module, the only hardware needed is optical
fibers and an opto/electrical converter for the PC/RTU, or a RS-485 connection depending on the used
IED communication interface.
19.6.1.1

Functionality

IEC 60870-5-103 is an unbalanced (master-slave) protocol for coded-bit serial communication
exchanging information with a control system. In IEC terminology a primary station is a master and a
secondary station is a slave. The communication is based on a point-to-point principle. The master must
have software that can interpret the IEC 60870-5-103 communication messages. For detailed information
about IEC 60870-5-103, refer to IEC 60870 standard part 5: Transmission protocols, and to the section
103, Companion standard for the informative interface of protection equipment.
19.6.1.2

Design

General
The protocol implementation consists of the following functions:
Phasor measurement unit RES670
Application manual
Station
HSI
Star coupler
IED
Example of IEC 60870-5-103 communication structure for a substation automation
system
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TCP/IP
Control
Center
Gateway
IED
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Section 19
Station communication
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