ABB REF 54 Series Technical Reference Manual page 64

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Technical Reference Manual, General
In the system described in the figure above, communication is usually arranged as
shown in the table below.
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Control commands
Events and alarms
Status of breakers and
isolators
Analogue measurement
values
Other DI, AI data
Other DO, AO data
Parameter data
SPA file transfer data
Other supported system configurations are represented in the following figures. A
LON bus and a parallel "SMS" bus connected as a SPA loop using the interface
module RER 123 on connector X3.2, allows to implement the redundant SMS
workstation.
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The REF 54_ feeder terminals connected with the IEC_103 to the IEC master device
using RER 123 on connector X3.2.
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transparent SPA bus messages
sliding window protocol
sliding window protocol
sliding window protocol
sliding window protocol
transparent SPA bus messages
transparent SPA bus messages
transparent SPA bus messages
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network variables
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network variables
network variables
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