7.HOLD FUNCTIONS
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7-3. Hold Setting --- inflection point ---
If you select the inflection point hold in the hold function setting, set the inflection point
detection parameters "minimum slope", "interval A" and "interval B".
Set referring to the principle of operation only when the value cannot be held
successfully with the factory settings or when further adjustments are required.
Detection of the inflection point
The logic of detecting the inflection point is given below.
Assuming that the remainder obtained by subtracting the amount of change C of the
indicated value over interval A from the amount of change of the indicated value over
interval B is D, when the amount of change D exceeds the inflection point judgment
value, point a is held as an inflection point.
If there are two or more inflection points in the hold period, the point having a larger
change is held.
The inflection point is normally detected by A=B, but it may easily be detected with
A<B where the slope is gradual.
D
C
C
A
B
a
Input Signal
A
：
IntervalA
B
：
IntervalB
D
：
The amount of change
Inflection point
Held as an inflection point if
D > inflection judgment value.
