Page 42
REM 543 Protection,
Monitoring and Control
Technical Reference Manual
Part 1, General
ABB Network Partner
4.1.10.4.
System structure
The system very often resembles the system in the figure below. Generator or motor
feeders are protected and controlled with REM 543 machine terminals. Some protec-
tion, control or alarm functions are implemented by using REF 54_ feeder terminals,
SPACOM units or other SPA bus devices (devices connected to the system via the SPA
bus). LON devices made by other manufacturers or other ABB companies may be used
for various BI, AI and BO functions. MicroSCADA is used for local control.
Fig. 4.1.10.4.-1. Example of a LON-based substation automation system.
In the system described in the figure above, the communication is usually arranged as
shown in the table below.
Data type
REM <-> MicroSCADA
REM, LSG and LonMark
devices to each other
Events and alarms
sliding window protocol
-
Control commands
transparent SPA bus messages
-
Status of breakers and
isolators
sliding window protocol
network variables
Analogue measurement
values
sliding window protocol
network variables
Other BI, AI, data
sliding window protocol
network variables
Other BO, AO data
transparent SPA bus messages
network variables
Parameter data
transparent SPA bus messages
-
ABB Network Partner
C
E
F
I
0
C
E
F
I
0
O
I
SPAC 331 C
O
I
SPAC 331 C
lonsys
DI, AI and DO modules
“LonMark devices”
SPA bus modules connected
using LON/SPA-gateways
RE_ 54_ protection
terminals connected
using RER 103
fibre-optic adapters
Electrical LON
network
RER 111 LON
star-coupler
Router card in
RER 111 LON
star-coupler
SPA bus
SPA bus
Fibre-optic
LON network
MicroSCADA
PCLTA card and
RER 107 inside PC
