CHAPTER 5: SETTINGS
PRODUCT SETUP
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
5-117
5
Table 5-13: Oscillography cycles/record example
TRIGGER MODE
— A new record automatically overwrites an older record when
TRIGGER MODE
is set to “Automatic
Overwrite.”
TRIGGER POSITION
— Set this to a percentage of the total buffer size (for example, 10%, 50%, 75%, and so on). A trigger
position of 25% consists of 25% pre- and 75% post-trigger data.
TRIGGER SOURCE
— Always captured in oscillography and can be any FlexLogic parameter (element state, contact input,
virtual output, and so on). The relay sampling rate is 64 samples per cycle.
AC INPUT WAVEFORMS
— Determines the sampling rate at which AC input signals (that is, current and voltage) are stored.
Reducing the sampling rate allows longer records to be stored. This setting has no effect on the internal sampling rate of
the relay, which is always 64 samples per cycle. That is, it has no effect on the fundamental calculations of the device.
5.3.9.2 Digital channels
SETTINGS
PRODUCT SETUP
OSCILLOGRAPHY
DIGITAL CHANNELS
DIGITAL 1(63) CHANNEL
— This setting selects the FlexLogic operand state recorded in an oscillography trace. The length of
each oscillography trace depends in part on the number of parameters selected here. Parameters set to “Off” are ignored.
To populate quickly the rows in the Offline Window, use Ctrl C/V to copy/paste, or click then double-click a row to display a
quick selection window.
Figure 5-50: Quick selection window
Records
CT/VTs
Sample rate
Digital
channels
Analog
channels
Cycles per
record
3
1
32
32
16
2399
3
1
64
32
16
1450
16
1
32
32
16
666
16
1
64
32
16
402
32
1
32
32
16
352
32
1
64
32
16
213
3
2
32
32
16
1516
3
2
64
32
16
851
16
2
32
32
16
421
When changes are made to the oscillography settings, all existing oscillography records are cleared.
DIGITAL CHANNELS
DIGITAL CHANNEL 1:
Off
Range: FlexLogic operand
DIGITAL CHANNEL 63:
Off
Range: FlexLogic operand
