ABB Relion 670 Series Applications Manual page 567

1MRK 511 401-UEN Rev. K
SPA communication is mainly used for the Station Monitoring System. It can include different
IEDs with remote communication possibilities. Connection to a PC can be made directly (if the
PC is located in the substation), via a telephone modem through a telephone network with ITU
(former CCITT) characteristics or via a LAN/WAN connection.
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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.
21.5.2 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
They are essential for all communication contact to the IED.
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 should be the same for the whole station although different communication
baud.
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
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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Station communication
SlaveAddress and BaudRate .
SlaveAddress and BaudRate can
Section 21
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