ABB RELION RET670, Applications Manual

Page: 946 / 1016

21.4.2 Setting guidelines
M11876-3 v6
SPA, IEC 60870-5-103 and DNP3 use the same rear communication port. This port can
be set for SPA use on the local HMI under
Main menu /Configuration /
Communication /Station communication/Port configuration/SLM optical serial
port/PROTOCOL:1
. When the communication protocol is selected, the IED is
automatically restarted, and the port then operates as a SPA port.
The SPA communication setting parameters are set on the local HMI under Main
menu/Configuration/Communication/Station communication/SPA/SPA:1 .
The most important SPA communication setting parameters are SlaveAddress and
BaudRate . They are essential for all communication contact to the IED. SlaveAddress
and BaudRate can be set only on the local HMI for rear and front channel
communication.
SlaveAddress can be set to any value between 1–899 as long as the slave number is
unique within the used SPA loop. BaudRate (communication speed) can be set between
300–38400 baud. BaudRate should be the same for the whole station although different
communication speeds in a loop are possible. If different communication speeds are
used in the same fibre optical loop or RS485 network, take this into account when
making the communication setup in the communication master (the PC).
With local fibre 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.
The IED does not adapt its speed to the actual communication
conditions because the communication speed is set on the local HMI.
Section 21
1MRK 504 163-UUS A
Station communication
940 Transformer protection RET670 2.2 ANSI
Application manual