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1MRK 505 370-UEN D
Remote
monitoring
IEC05000715 V4 EN-US
Figure 221: SPA communication structure for a remote monitoring system via a
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.
glass
plastic
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.
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
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
Busbar protection REB670
Application manual
Utility LAN
substation LAN, WAN and utility LAN
<1000 m according to optical budget
<25 m (inside cubicle) according to optical budget
BaudRate (communication speed) can be set between 300–38400
WAN
IED
IED
SlaveAddress and BaudRate can
Section 17
Station communication
Substation LAN
IED
IEC05000715-4-en.vsd
SEMOD115767-25 v3
SlaveAddress and BaudRate .
M11876-3 v7
411
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