KEYENCE EX-V Series - Manual (Page 91)

Chapter 4 Use of Data Processing Functions
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Sample hold function [b-4]
Measures the value at a specified time.
For the sample hold function, the timing can be specified with the combination of
the trigger mode and delay time settings.
➮ For the details of the trigger mode and delay time, refer to pages 69 and 70.
➮ For the details of flicker delay, refer to pages 70 to 73.
Timing diagram
■ External trigger mode
• The value measured at the instant when the timing input turns ON is displayed/
output.
Reference: To clear the measured value being held, short-circuit the hold-reset
and GND terminals.
■ Internal trigger mode (Example of internal trigger up )
• The sampling operation starts when the sampling delay time elapses after the
measured value exceeds the trigger level. When the sampling period elapses,
the internal timing signal is turned ON and the measured value at the instant is
displayed/output.
• For the internal trigger down operation, the trigger point is the instant when
the measured value falls below the trigger level.
• The instant when the sampling starts, the strobe output turns ON.
• Turning the strobe output from ON to OFF results in the off-delay of 2 ms for
updating the comparator output.
Reference: To clear the measured value being held and to start the measurement
again, short-circuit the hold-reset and GND terminals.
(t) 0
ON
OFF
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
Sample hold value
(t) 0
ON
OFF
ON
OFF
ON
OFF
When the power is turned ON or the hold-reset signal is input,
the display shows " " until the first measured value is
determined.
Displayed value
Internal data reset
Internal timing
Strobe output
Trigger
point
Sample hold value
Sampling delay
Sampling period
Sampling delay
Sampling period
Trigger level