Triggering; Settings And Unloading - ABB REJ 527 Technical Reference Manual

ABB Substation Automation
Products and Systems
4.1.7.4.
4.1.7.5.
1MRS750616-MUM
Technical Reference Manual
Writing the value 0 to the parameter clears the recorder memory, restarts storing of
new data into the memory and enables triggering of the recorder. Writing the value
2 to the parameter restarts the unloading process in the recorder by setting the time
stamp and first data ready to be read. Writing the value 4 to the parameter triggers
the recorder.

Triggering

Triggering the disturbance recorder for start of a new recording sequence is only
possible if the recorder is not already triggered (V246=0).
The recorder can be triggered either manually by writing the value 4 to parameter
V246 or it can be triggered by the rising or falling edge of the signals from the
internal protection stages and/or the binary input signal. Triggering on the rising
edge means that the recording sequence starts when the signal is activated.
Correspondingly, triggering on the falling edge means that the recording sequence
starts when the active signal resets.
Serial parameters V241...V244 define the triggering conditions and parameter V246
is for manual triggering. When the recorder has been triggered and a recording
stored into the memory, the value of parameter V246 changes from 0 to 1.

Settings and unloading

Setting parameters for the disturbance recorder are V parameters V241...V246 and
M parameters M18, M20 and M80...M81.
Parameter Description
V241 Specifies the signal(s) to be used for triggering: signal(s) from
the internal protection stages and/or the binary input signal.
V242 Defines whether the recorder is to be triggered on the falling or
rising edge of the signal(s) specified by parameter V241.
V243 Defines the external binary input signal to be used for
triggering.
V244 Defines whether the rising or falling edge of the binary input
signal is to trigger the recorder.
V245 Length of recording after triggering. The total recording length
is 60 cycles.
V246 Status of the recorder.
M18 Used for giving the disturbance recorder a unique identification
number.
M20 Used for designating the disturbance recorder the name of the
station where the relay is located. The maximum length of a
name is 15 characters.
M80 Used for designating the rated voltage and unit of the primary
voltage transformer. The format of the parameter is XXXX,YY;
where XXXX is the voltage value ranging between 0.00 and
600, and YY is the unit, e.g. 20.0,kV. The rated voltage and unit
are used for calculating the primary values for the analogue
channels in a special PC program used for unloading the
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