KEYENCE IL Series - Manual (Page 67)

4-2 Basic Settings and Advanced Settings
4-13 IL-E
4
Setting V
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The IL series cannot complete a measurement if it is outside the measurement range or if
the light amount is excessive or insufficient. (If the measurement is impossible for a number
of samples equal to the alarm number, "---" will appear.)
Details of operations when measurement is impossible are set with the alarm setting.
The alarm output is ON during normal measurement. It turns OFF when an alarm or error state occurs.
* If measurement is impossible immediately after powering on or immediately after reset
input, the display [-----] is held.
4. Alarm Setting #./
Setting value Description
Default
value
Default
When measurement is impossible, this option sets the
default number of samples for which the previous normal
value is held.
This differs according to the set sampling rate.
c
Clamp
When measurement is impossible, the previous normal
value is held until measurement is restored.
User setting
When measurement is impossible, this option sets the number
of samples for which the previous normal value is held.
The settable range is as follows:
Point
• If the default or user setting is selected and measurement remains
impossible after the number of alarms, the measured value is dis-
played as [-----]. This is called the alarm state.
• When the amplifier is in alarm state and valid measurement values
are obtained for a number of samples equal to the averaging value
+ 2, the amplifier recovers from the alarm state and displays the
measured value.
• If measurement is restored not later than the number of sampling
times specified for the default or user setting, the hold function is
cancelled.
• The alarm output after power up or reset input is ON until the amplifier
recognizes an unmeasurable state even if [-----] is displayed.
• The alarm output is turned ON once a reset is executed in
response to reset input.
• The alarm output operates as a normally closed contact irrespective of
how the output method is changed ( "5. Output State" (page 4-14)).
• The alarm output is not held by timing input.
Sampling rate Sampling rate
0.33 ms 6 times
Other than 0.33 ms 7 times
Setting range Default value
2 to 1000 times 7 times