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Auto-teaching
1. Check that the mode selector is set to either RUN or ADJUST.
2. Input a 0.9-s pulse signal into the remote control I/O terminal.
3. Auto-teaching starts when the mark is moved. When the mark passes six times, auto-teaching completes.
•
If teaching is successful, answer-back output from the remote control I/O terminal will turn ON for 0.3 s.
•
If teaching is unsuccessful, no answer-back signal will be output. Readjust using two-point teaching.
(Teaching will be unsuccessful if there is no difference in incident between the mark and base.)
4. If the answer-back signal is ON, the whole teaching operation will be completed. The output will be turned ON whenever the mark (i.e., the color
with shorter passing time) is detected.
Auto-teaching
Remote control input/
Answer-back output
Auto-teaching
Incident
Example of Connection to Programmable Controller
Sensor
Remote control I/O
Note: Be sure to connect the E3M-V to the Programmable Controller as shown
above.
Precautions when Using Automatic Teaching
Incorrect discrimination may be caused by automatic teaching in the
following cases. Use one-point or two-point teaching in such cases.
• Color patterns exist in the base.
• Sensing objects change their positions.
• Sensing objects have protrusions or surface level differences.
1.
Make sure that the input tolerance of each pulse is within ±0.1 s.
E3M-V
1
Teaching starts
Dummy sampling (1st mark)
Programmable Controller
I/O Unit
Output
Input
Teaching completes and detection starts
Sampling (5th mark)
Threshold Level Adjustments
It is possible to make fine adjustments of the threshold level after
teaching. Such fine adjustments can be made remotely as well. Refer
to Remote control Function (Bank Selection, Mark Registration, and
Threshold Adjustments) on page A-140 .
1
Set the mode selector to ADJUST
Select the upper or lower threshold selector. Whenever the SET
button is pressed, the threshold level will move. Two indicators
will be lit together when the threshold level is an even level.
Press
2
Threshold
indicators
Threshold
level
3
After setting the level, set the mode selector to RUN.
Answer-back
Time
Mark (shorter passing time):
Output ON
Optimal threshold level set
Base: Output OFF
Time
The threshold level increases.
Upper
threshold
limit
The threshold level decreases.
Lower
threshold
limit
A-139
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