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Section 17
Station communication
optical loop or RS485 network, take this into account when making the communication setup
in the communication master (the PC).
With local fiber optic communication, communication speed is usually set to 19200 or 38400
baud. With telephone communication, the speed setting depends on the quality of the
connection and the type of modem used. Refer to technical data to determine the rated
communication speed for the selected communication interfaces.
17.6
IEC 60870-5-103 communication protocol
17.6.1
Application
IED
IEC05000660 V4 EN-US
Figure 222: 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.
412
The IED does not adapt its speed to the actual communication conditions
because the communication speed is set on the local HMI.
Station HSI
Star coupler
IED
automation system
TCP/IP
Control Center
Gateway
IED
IEC05000660-4-en.vsd
1MRK 505 370-UEN D
IP14615-1 v2
IP14864-1 v1
M17109-3 v7
Busbar protection REB670
Application manual
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