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4.7.6
Switching Waveforms
The FUNCTION field available in each transient list event setup menu may be used to
dynamically switch waveforms during transient execution. This allows different waveforms to be
used during transient execution. Waveforms may be switched without the output of the source
being turned off. For three phase configurations, each phase has its own waveform list so
different waveforms may be programmed on different phases during transient execution.
Figure 4-13 illustrates the concept of using different waveforms at different steps in a transient
list. In this case, the change was programmed to occur at the zero crossing. Any phase angle
can be used to start the transient execution, however. To keep the phase angle synchronization,
the dwell times have to be set to an integer number of periods. Over long periods of time, phase
synchronization may get lost due to timing skew between the waveform generator and the
transient state machine.
MX15 Series
Figure 4-13: Switching Waveforms in a Transient List
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