ABB SPAC 536 C User Manual page 121

Serial
communication
parameters
Event codes
When the overcurrent and earth-fault relay
module SPCJ 4D24 is linked to the control data
communicator SACO 148 D4 over a SPA bus,
the module will provide spontaneous event
markings e.g. to a printer. The events are printed
out in the format: time, text which the user may
have programmed into SACO 148 D4 and
event code.
The codes E1...E16 and the events represented
by these can be included in or excluded from
the event reporting by writing an event mask
V155 for the overcurrent events and V156 for
earth-fault events to the module over the SPA
bus. The event masks are binary numbers coded
to decimal numbers. The event codes E1...E8
are represented by the numbers 1, 2, 4...128.
An event mask is formed by multiplying the
above numbers either by 0, event not included
in reporting, or 1, event included in reporting
and adding up the numbers received, compare
the procedure used in calculation of a checksum.
The event masks V155 and V156 may have a
value within range 0...255. The default value of
the overcurrent and earth-fault relay module
SPCJ 4D24 is 85 both for overcurrent and earth-
fault events, which means that all startings and
trippings are included in the reporting, but not
the resetting.
The output signals are monitored by codes
E17...E26 and the events represented by these
can be included in or excluded from the event
reporting by writing an event mask V157 to the
Code Event
E1 Starting of stage I>
E2 Starting of stage I> reset
E3 Tripping of stage I>
E4 Tripping of stage I> reset
E5 Starting of I>> stage
E6 Starting of I>> stage reset
E7 Tripping of stage I>>
E8 Tripping of stage I>> reset
Default checksum for mask V155
module. The event mask is a binary number
coded to a decimal number. The event codes
E17...E26 are represented by the numbers 1, 2,
4...512. An event mask is formed by multiply-
ing the above numbers either by 0, event not
included in reporting or 1, event included in
reporting and adding up the numbers received,
compare the procedure used in calculation of a
checksum.
The event mask V157 may have a value within
the range 0...1024. The default value of the over-
current and earth-fault relay module SPCJ
4D24 is 768 which means that only the opera-
tions of the trip relay are included in the re-
porting.
The codes E50...E54 and the events represented
by these cannot be excluded from the reporting.
An event buffer is capable of memorizing up to
eight events. If more than eight events occure
before the content of the buffer is sent to the
communicator an overflow event "E51" is gen-
erated. This event has to be reset by writing a
command "0" to parameter C over the SPA-
bus.
More information about the serial communi-
cation over the SPA-bus can be found in the
manual "SPA-BUS COMMUNICATION
PROTOCOL", 34 SPACOM 2 EN1.
Event codes of the combined overcurrent and
earth-fault relay module SPCJ 4D24:
Weight factor Default value
1
2
4
8
16
32
64
128
of the factor
1
0
1
0
1
0
1
0
85
27