13
Serial
communication
parameters
Event codes
The substation level control data communica-
tor is able to read, over the SPA serial bus, the
event data of the module, e.g. starting and
tripping, from the over-/undervoltage relay
module SPCU 3C14. Event information called
for are printed out in the format: time (ss.sss)
and event code. The event codes of the module
are E1...E8, E50 and E51. Furthermore, the
substation level control data communicator is
able to form event codes relating to e.g. the data
communication.
The codes E1...E8 and the events represented by
these can be included in or excluded from the
event reporting by writing, over the SPA bus, a
so called event mask (V155) to the module. The
event mask is a binary number coded to a
decimal number. The event codes E1...E8 are
represented by the numbers 1, 2, 4...128. The
event mask is formed by multiplying above
numbers either by 0 (event not included in
reporting) or 1 (event included in reporting)
and adding up the numbers received (compare
calculation of checksum).
The event mask may have a value in the range
0...255. The default value of the over-/under-
voltage relay module SPCU 3C14 is 85, which
means that all startings and trippings are in-
cluded in the reporting, but not the resetting.
The codes E50...E54 and the events represented
by these cannot be excluded from the reporting.
Event codes for over-/undervoltage relay mod-
ule SPCU 3C14:
Code Event Weighting Default
coefficient setting
E1 Starting of overvoltage stage U> 1 1
E2 Starting of overvoltage stage U> reset 2 0
E3 Tripping of overvoltage stage U> 4 1
E4 Tripping of overvoltage stage U> reset 8 0
E5 Starting of undervoltage stage U< 16 1
E6 Starting of undervoltage stage U< reset 32 0
E7 Tripping of undervoltage stage U< 64 1
E8 Tripping of undervoltage stage U< reset 128 0
Default value of event mask V155 85
E50 Restart of microprocessor * -
E51 Overflow of event register * -
E52 Temporary interruption in data communication * -
E53 No response from the relay module over the data
communication bus * -
E54 The module responds again over the data
communication bus * -
0 not included in event reporting
1 included in event reporting
* no code number, always included in event reporting
- cannot be set
NOTE!
In the SPACOM system the event codes E52...
E54 are generated by the station level control
data communicator, e.g. type SRIO 1000M.
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