A-460
Advanced Photoelectric Sensors
Setting Thresholds
Teaching for Through-beam or Retroflective Sensor Heads
Teaching for a Through-beam or Retroflective Sensor Head is performed without a workpiece.
A value about 6% less than the incident light level is set as the threshold value. This method is ideal to stably detect very small
differences in light level.
If DIFF (differential operation) is set for the detection method, the threshold value will be set to the minimum value below
the incident light level without a workpiece that will enable stable detection.
Setting Mode
Teaching for Reflective Sensor Heads
Teaching for a Reflective Sensor Head is performed without a workpiece (i.e., for the background).
A value about 6% greater than the incident light level is set as the threshold value.
This method is ideal to stably detect very small differences in light level.
If DIFF (differential operation) is set for the detection method, the threshold value will be set to half of the difference be-
tween the two measured values.
Reflector
Setting Errors
Switch to SET mode.
Switch to RUN mode.
Threshold value
THRU
TECH
----
THRU
LO
Flashes twice
RUN
SET
RUN
SET
The sub-display will flash.
Teaching completed and previous display returns.
The threshold value that was set will flash twice.
Do one of the following and then repeat the operation
•
Adjust the Head to increase the incident light level.
•
Execute power tuning.
Press the UP or DOWN key.
