Time Tagged Events; Configurable Logic; Remote Serial Communication - Lon - ABB REC 561 User Manual

ABB Network Partner AB
Version 1.0-00

3.3 Time tagged events

3.4 Configurable logic

3.5 Remote serial
communication - LON
Introduction - REC 561
The positions of the high-voltage apparatuses are inputs to the software
modules distributed in the control terminals. Each module contains the
interlocking logic for a bay. The interlocking logic in a module is differ-
ent, depending on the bay function and the switchyard arrangements, that
is, single-breaker or double-breaker bays have different modules.
Events are time tagged at the source, so REC 561 provides high accuracy
with a resolution of 1 ms with minute pulse for synchronization. The time-
tagged events are transferred over the LON bus to the station level for
recording and storing. Thirty-six event function blocks are available in a
basic REC 561 for time tagging or data exchange between control termi-
nals. That means that up to 576 (16 * 36) events and signals for data
exchange can be handled in a basic control terminal. Eight more event
function blocks (up to 704 events and signals for data exchange) are avail-
able in REC 561 type 3 (basic + option 2).
Forty-eight binary signals can be selected to the event recorder function in
the control terminal. An event list for up to 150 time-tagged events,
selected from these 48 signals, are available for each of the last 10
recorded disturbances. These lists are available via the PC connection on
the front, via the SMS port, or via the complete Substation Automation
system.
Many configuration logic circuits are built into the REC 561 terminal and
are thus available to the user. The configuration logic contains these func-
tional blocks: 249 AND, 199 OR, 79 inverters, 39 exclusive OR, 5 Set-
Reset, 10 timers delayed at pick-up and drop-out, and 50 pulse-timers.
The configuration is performed from the CAP 531 configuration tool.
A serial communication port based on the LonWorks Network (here
called the LON bus) is available within the REC 561. This port is used to
transfer data between different control terminals and PC-based operator
stations. The communication with REC 561 uses optical fibres (glass or
plastic) to eliminate influence of electromagnetic interferences.
The REC 561 can communicate with the HV/Control software library
installed in a PC-based operator station, type MicroSCADA under Win-
dows NT™. That gives the operator, in a standardized way, possibilities to
control high-voltage apparatuses and receive information from the substa-
tion.
The benefits achieved by use of the LON bus in protection and control
systems include direct communication among all control terminals in the
system and support for multi-master implementations. Further the LON
bus has an open concept, so that REC 561 can communicate with external
devices using same standard of networks variables.
1MRK 580 146-XEN
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