Novatech Bitronics M87X Series, Manual

Page: 160 / 184

ML0021 August 15, 2018
144
Copyright 2018 Bitronics, LLC
The following steps illustrate a typical configuration:
1. In the 70 Series Configurator, Figure A5 shows how any event of interest measured
directly by an M871 is configured to initiate an oscillography recording and make an
SOE Log entry. (Only Phase-A Amps is shown, but the Trigger window scrolls
vertically and can hold up to 120 separate independent events.)
Figure A 5
2.
The condition “Waveform Recorder 1 Started” is represented by a soft bit which is an
element in the IEC-61850 Object Model (Records/WrxRDRE1.ST.RcdStr.stVal). Other
soft bits are available to represent recorders WR2, DR1 and DR2 as needed (see 70
Series IEC-61850 manual, MICS document). The
IED Configurator will be used in
steps 4 and 5 below to make the M871 publish a GOOSE message when this bit
changes status. The bit is set when WR1 begins recording. It remains set until it is re-
initialized.
Note:
No self-initializing bits are defined by the 61850 object model so an entry must
be made in the 70 Series Configurator to re-initialize the bit a short time after it is set.
Event 2 in Figure A6 illustrates that instruction. The choice of a particular duration
(Event 2, far right column) as the dwell time before the bit is reset is more-or-less
arbitrary, but should generally be shorter than the run-time of the recorder. No new
cross-trigger can be sent via GOOSE until the bit is re-initialized and WR1 has
completed recording.