ABB Relion 670 Series Applications Manual page 447

1MRK 505 370-UUS Rev. K
can be applied on each fiber optic loop. A program is required in the master computer for interpretation of
the SPA-bus codes and for translation of the data that should be sent to the IED.
For the specification of the SPA protocol V2.5, refer to SPA-bus Communication Protocol V2.5.
17.5.2 Setting guidelines
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 fiber 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.
Busbar protection REB670
Application manual
The IED does not adapt its speed to the actual communication conditions because the
communication speed is set on the local HMI.
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Section 17
Station communication
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