7.HOLD FUNCTIONS
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Example of inflection point hold setting
●
Example of ideal waveform setting
①
Set the load change time (between the inflection point and when the change stops) to
interval B.
In the example, it is set to 200 since it is 100 msec.
②
Set the same value as interval B to interval A.
③
Set load D obtained by subtracting load C changing with interval A from the load
changing with interval B to the inflection point judgment value.
In the example, set load change D=80 obtained by subtracting load C=10 changing
with A from load 90 changing with B to the inflection point judgment value.
However, since an inflection point is not judged until load change D exceeds the
inflection point judgment value, actually set the inflection point judgment value a
slightly smaller than D.
●
If the inflection point cannot be located successfully
①
When holding above the inflection point and
moving downward
１）
It is considered that the inflection point
judgment value is small with respect to load
change D. Set the inflection point judgment
value larger.
２）
If lowering is insufficient in 1), increase
interval A.
②
When holding below the inflection point and
moving upward Interval B is too long and the
inflection point judgment value is too large.
Shorten interval B and decrease the inflection
point judgment value.
100
20
10
0
100msec
A
100msec
B
D = 80
C = 10
①
②
