ABB Relion 670 Series Applications Manual page 543

1MRK 511 401-UUS F
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Functionality
The SPA protocol V2.5 is an ASCII-based protocol for serial communication. The communication is
based on a master-slave principle, where the IED is a slave and the PC is the master. Only one
master 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.
20.5.2 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
are essential for all communication contact to the IED.
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 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.
Bay control REC670
Application manual
<1000 m according to optical budget
<25 m (inside cubicle) according to optical budget
BaudRate (communication speed) can be set between 300–38400 baud.
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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SlaveAddress and BaudRate . They
SlaveAddress and BaudRate can be set only
Section 20
Station communication
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M11876-3 v7
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