GE Industrial Solutions Entellisys 4.0 System User Manual - Manual (Page 142)

Sequence of events, fault reports and waveform capture records 142
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waveform buffer capacity has been reached, as discussed below. It is necessary to manually
clear the waveforms from memory using the Clear Waveforms button on this screen to
resume capture in this mode.
•
Pre-Trigger Setting – Selects the amount of pre-trigger information contained in each
waveform, from 0 to 119 half-cycles worth of data.
•
Force Trigger – Forces a waveform capture to occur. It is necessary to press the Refresh
button to update the information on the screen to reflect the new capture.
•
Waveform Flexlogic Trigger– Waveform capture is triggered when the assigned Flexlogic
Virtual Output transitions from low to high. To view the waveform, find the “Waveform
Capture Triggered By FlexLogic” event and click on the associated waveform icon
(See section 9.2.2) .
9.2.2 Viewing waveforms
To view a waveform capture on the HMI screen, highlight the event in the SOE listing with which
the waveform is associated and click the Waveform button.
The waveforms in Figure 9-7 were captured from an overcurrent condition. At the left of each
time line, magnitude data or operation status are shown for the displayed waveform trace.
Figure 9-7 Waveforms captured from an overcurrent condition
At the top of the window, the Trigger Date (D/M/Y) and time of triggering (to nearest
microsecond) are displayed.
The Cursor 1, Cursor 2 numeric values indicate the position of the corresponding cursor from
the start of the record. The Delta numeric value displays the time difference between Cursor 1
and Cursor 2.