Acuity AccuRange AR500, Руководство пользователя

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AR500 User’s Manual
LLL00xxxx – Rev 1.0 18
7. Logic Interface(s) Operation (02h bits M1 and M0)
All AR500 sensors include a multi-purpose logic line. See the wiring description
in section 4.5.
This line can work in one of the four
modes defined by the configuration
parameter of parameter 02h
Distance Alarm : This is the default logic output. Bits M1 and M0 have values
00. The output value is 0 when the measured distance is out of the range or
selected window (see Analog Window in section 6.3).
Synchronization of two or more sensors : Bits M1 and M0 have values 01 to
activate this mode. The synchronization mode makes it possible to synchronize
measurement sample times of two and more sensors. Synchronization is
achieved by tying together the trigger input lines of multiple sensors and also
the logic output lines of the sensor. Synchronization is a valuable feature for
thickness measurements using opposing laser sensors so that measurements
are captured at exactly the same instant.
Hardware Zero Set (Tare function) : Bits M1 and M0 have values 10 to
activate this mode. When the Logic Interface wire is grounded, the currently
measured distance is assigned as the zero point and subsequent measurements
are now relative to this location within the span.
Laser Disable: Bits M1 and M0 have values 11 to activate this mode. When
the Logic Interface wire is grounded, the laser is ON. When the switch is
removed from ground, the laser is OFF. This controls only the laser diode and
not power to the sensor itself.