KEYENCE EX-V Series - Manual (Page 70)

Chapter 4 Use of Data Processing Functions
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Difference between peaks (bottoms) [b-2]
Measures the difference between the maximum and minimum values of the peak
(bottom ) values during a specified period (sampling time).
The following two types of measurement are available:
1. "b-20" Difference between peak values measurement: Measures the difference
between the maximum and minimum values of the peak values.
2. "b-21" Difference between bottom values measurement: Measures the differ-
ence between the maximum and minimum values of the bottom values.
Timing diagram
For "b-20" measurement
■ External trigger mode
• The sampling period is between the UP edge of the timing input (hold-reset
input) and the UP edge of the next timing input.
• The value measured at the instant when the timing input turns ON is displayed/
output.
• The EX-V series determines the peak value when the measured value
decreases from the maximum value by a specified hysteresis value. Take this
into account when inputting the timing signal.
Reference: To clear the measured value being held and start the measurement
again, short-circuit the hold-reset and GND terminals.
For "b-21" measurement
■ External trigger mode
• The sampling period is between the UP edge of the timing input (hold-reset
input) and the UP edge of the next timing input.
• The value measured at the instant when the timing input turns ON is displayed/
output.
• The EX-V series determines the bottom value when the measured value
increases from the minimum value by a specified hysteresis value. Take this
into account when inputting the timing signal.
Reference: To clear the measured value being held and start the measurement
again, short-circuit the hold-reset and GND terminals.
(t) 0
ON
OFF
p1 p2 p4 p3
(p1-p2)
(p4-p3)
When the power is turned ON or the hold-reset signal is input,
the display shows " " until the first timing signal is input.
Displayed value
Timing input
Sampling period Sampling period
(t) 0
ON
OFF
b2 b1
b3
b4 (b2-b1)
(b3-b4)
When the power is turned ON or the
hold-reset signal is input, the display
shows " " until the first timing
signal is input.
Displayed value
Timing input
Sampling period Sampling period