ABB SPAJ 141 C User Manual And Technical Description page 55

S e r i a l c o m m u n i c a t i o n p a r a m e t e r s o f t h e S P C J 4 D 2 4 u n i t
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 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 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 mask V157 may have a value within the range 0...1024. The default value of the overcurrent and
earth-fault relay module SPCJ 4D24 is 768 which means that only the operations of the trip relay are included
in the reporting.
The codes E50...E54 and the events represented by these cannot be excluded from the reporting.
An event buffer is capable to memorize up to eight events. If more than eight events occure before the content
of the buffer is send to the communicator an overflow event "E51" is generated. This event has to be resetted
by writing a command "0" to parameter C over the SPA-bus.
More information about the serial communication over the SPA-bus can be found in the manual "SPA-BUS
COMMUNICATION PROTOCOL", 34 SPACOM 2 EN1.
PAINOS PAINOS
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