KEPCO BOP-MG 1KW, Руководство оператора

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3-28
BOP HIPWR 111315
Each waveform has an identifying name, the operating mode (voltage or current), positive and
negative protection values, and the count (the number of times the complete waveform is to be
repeated). Setting the count to zero allows the waveform to repeat continuously.
A waveform is comprised of at least one, or as many as 10 segments. Each segment has an
individually specified value for Type, Frequency or Period, Amplitude, Offset, Start angle, Stop
angle, and Initial/Repeat; see Table 3-11 for details. Refer to PAR. 3.3.9.4 to view a previously
saved waveform, PAR. 3.3.9.6 to execute a previously saved waveform, PAR. 3.3.9.7 to modify
a previously saved waveform, PAR. 3.3.9.8 to create a new waveform and PAR. 3.3.9.9 for an
example with detailed instructions on how to create a complex waveform.
FIGURE 3-9. SAVED WAVEFORMS MENU
3.3.9.3 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 3-9 and 3-10 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 not be accepted. Four segments of 10Hz will be acceptable, while five segments
at 10 Hz will not be accepted. Reducing the segment by using the start and stop angle will also
reduce the number of points used.
Each time a segment is added, the waveform is validated. When a segment is added that
causes the point total to exceed 3933, three asterisks *** will appear to the left of the segment,
and the error message “LIST TOO SMALL” will be displayed briefly. This can be corrected by
VOLTAGE
SOURCE
VOLTAGE
CURRENT
0.0000 0.0000