KEPCO BOP-GL 1KW Operator Manual Firmware Ver.3.05 and higher - Manual (Page 85)

BOP-1K-GL 022814
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3.5.7.2 UNDERSTANDING HOW WAVEFORMS ARE GENERATED
Waveform are generated by the BOP by producing a series of discrete output levels (points) in a
prescribed pattern. In the case of sine, triangle and ramps, this produces an output that con-
forms to an approximation of the selected waveform type. The number of points available for a
waveform is limited to 3933 for all segments. Since there are a finite number of points, the lower
the frequency, the more points used, and the smoother the output waveform will appear. As the
frequency increases, fewer points are available for each cycle and the resulting waveform may
appear somewhat more jagged. Tables 3-4 and 3-5 list the number of points used for each fre-
quency range of sine, triangle and ramp waveforms and for square waveforms, respectively.
Levels use a maximum of 60 points.
This means that a waveform consisting of a single sinewave segment at 0.1 Hz will use all 3840
points to generate each cycle, while a sinewave at 440 Hz will use 24 points for each cycle.
Note that a single segment between 0.01Hz and 1.8Hz uses all available points, so subsequent
segments will result in an error “-223, “too much data” and some points may appear in the list.
This can be corrected by either reducing the number of segments, or increasing the frequency
of the existing segments until the point total is acceptable.
TABLE 3-4. SINE, TRIANGLE AND RAMP WAVEFORM FREQUENCY VS. POINTS
Frequency
(See Notes 1, 2, and 3) Total Points
Frequency
(See Notes 1, 2, and 3) Total Points
From To From To
0.01Hz 2.7Hz 3840 55.5Hz 66.5Hz 160
2.71Hz 3.6Hz 2880 66.6Hz 88.7Hz 120
3.71Hz 5.5Hz 1920 88.8Hz 118.3Hz 90
5.6Hz 8.3Hz 1280 118.4Hz 147.9Hz 72
8.4Hz 11.0Hz 960 148Hz 177.4Hz 60
11.1Hz 14.7Hz 720 177.5Hz 221.8Hz 48
14.8Hz 22.1Hz 480 221.9Hz 295.8Hz 36
22.2Hz 33.2Hz 320 295.81Hz 354.9Hz 30
33.3Hz 44.3Hz 240 355.9Hz 443.7Hz 24 (See Note 2)
44.4Hz 55.4Hz 192 443.8z 532Hz 20 (See Note 3)
NOTES: 1. As the frequency varies within the range, the time interval per point varies proportionately,
decreasing as the frequency increases.
2. Sine and Triangle segments can not exceed 443Hz.
3. Ramp segments can not exceed 532Hz.