Setting Guidelines - ABB REB670 Applications Manual

1MRK 505 337-UUS -
16.4.2
Application manual
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 fibre 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.

Setting guidelines

The setting parameters for the SPA communication are set via the local HMI.
SPA, IEC 60870-5-103 and DNP3 uses the same rear communication port. Set the
parameter Operation, under Main menu /Settings /General settings /
Communication /SLM configuration /Rear optical SPA-IEC-DNP port /Protocol
selection to the selected protocol.
When the communication protocols have been selected, the IED is automatically
restarted.
The most important settings in the IED for SPA communication are the slave number and
baud rate (communication speed). These settings are absolutely essential for all
communication contact to the IED.
These settings can only be done on the local HMI for rear channel communication and for
front channel communication.
The slave number can be set to any value from 1 to 899, as long as the slave number is
unique within the used SPA loop.
The baud rate, which is the communication speed, can be set to between 300 and 38400
baud. Refer to technical data to determine the rated communication speed for the selected
communication interfaces. The baud rate should be the same for the whole station,
although different baud rates in a loop are possible. If different baud rates in the same fibre
optical loop or RS485 network are used, consider this when making the communication
setup in the communication master, the PC.
For local fibre optic communication, 19200 or 38400 baud is the normal setting. If
telephone communication is used, the communication speed depends on the quality of the
connection and on the type of modem used. But remember that the IED does not adapt its
speed to the actual communication conditions, because the speed is set on the local HMI.
Section 16
Station communication
445