20
AR100 Operation Manual
7.
Logic Interface(s) Operation
All AR100 sensors include a multi-purpose logic line. See the wiring description
in section 4.5.
7.1
Binary Communication (02h bits M2, M1, and M0)
Default Value:
000
–
Distance Alarm Mode
When the laser is set to binary communication, this line can be set to one of
the eight
modes
defined by the M bits of parameter 02h
Distance Alarm Mode
: To activate this mode from another, set bits M2, M1,
and M0 to
000
. 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 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. There are two
modes:
•
‘Master’ mode:
o
Activate this mode by setting bits M2, M1, and M0 to
111
.
•
‘
Slave
’ mode:
o
Activate this mode by setting bits M2, M1, and M0 to
001
.
Hardware Zero Set Mode (Tare function)
:
Activate this mode by setting
bits M2, M1, and M0 to
010
. 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 Mode:
Activate this mode by setting bits M2, M1, and M0 to
011
. 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.
Encoder Mode:
Activate this mode by setting bits M2, M1, and M0 to
100
. In
this mode, the Trigger Input (White) and Logic Interface (Pink) wires work as
inputs for a quadrature encoder signal, and if an encoder is connected to these
lines, measurements will be synchronized with the encoder.
Input Mode (Ethernet models only):
Activate this mode by setting bits M2,
M1, and M0 to
101
. In this mode, The Logic Interface line state is transmitted
in the status word of an Ethernet packet.
Ethernet Packet Counter Reset Mode (Ethernet models only):
Activate
this mode by setting bits M2, M1, and M0 to
110
. In this mode, connecting
the Logic Interface wire to ground will reset the Ethernet packet counter.
