ABB Relion 670 Series Applications Manual page 305

1MRK 511 407-UUS Rev. J
19.6 IEC 60870-5-103 communication protocol
19.6.1 Application
IED
ANSI05000660 V4 EN-US
Figure 114: Example of IEC 60870-5-103 communication structure for a substation
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
Phasor measurement unit RES670
Application manual
Station
HSI
Star coupler
IED
automation system
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TCP/IP
Control
Center
Gateway
IED
ANSI05000660-4-en.vsd
Section 19
Station communication
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