Banner D10 Series - Manual (Page 5)

P/N 64154 rev. F
5
D10 Expert
™
Dual Discrete Outputs
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Dynamic TEACH and Adaptive Thresholds
• TEACH on-the-fly.
• Sets a single threshold.
• Threshold position is adjustable using the “+” and “-” buttons (see Manual Adjust, page 9).
Dynamic TEACH is used to program sensitivity during actual machine run conditions.
During Dynamic TEACH, the sensor takes multiple samples of the light and dark conditions
and automatically sets the sensitivity at the optimum level. Dynamic TEACH activates the
sensor’s adaptive threshold system, which continuously tracks minimum and maximum signal
levels, and automatically maintains centering of the switch point between the light and dark
conditions. The adaptive threshold system remains in effect during RUN mode to automatically
adjust for changes in the light or the dark conditions.
When Dynamic TEACH mode is used to program sensitivity, the output ON state (light or dark
operate) will remain as it was last programmed. To change to either light or dark operate, use
the SETUP mode (see page 10).
Dynamic TEACH and Manual Adjust
Sensitivity may be adjusted at any time when the sensor is in RUN mode by clicking the “+”
and “-” buttons. However, when a manual adjustment is made, the adaptive threshold system
is disabled (cancelled).
Push Button
Remote
0.04 sec. ≤ T ≤ 0.8 sec.
Result
Access
Dynamic
TEACH
Mode
• Press and hold
Dynamic (+)
button.
• Hold remote line
low (to ground). • Display flashes “dyn”
• Arrow icon turns red
TEACH Sensing
Conditions
• Present Output
ON/OFF conditions
while continuing to
hold Dynamic button. • Present Output
ON/OFF conditions
while continuing
to hold remote
line low (to ground)
Return
to
RUN
Mode
• Release Dynamic
button. • Release remote
line/switch. TEACH conditions acceptable:
• Display flashes “pass,” followed
by a number (denoting contrast);
see Figure 5.
• Sensor returns to RUN mode with
new settings.
• Arrow icon turns green
TEACH conditions unacceptable:
• Display flashes “fail”
• Arrow icon remains red
• Sensor returns to RUN mode
(Arrow icon turns green) without
changing settings.
T T T
T T T T T T T
T T T
T T T T T T T
T T T
T T T T T T T
dynamic
static
dynamic
static
dynamic
static
Sensor positions
threshold midway
between taught conditions
Sensor positions
threshold midway
between taught conditions
Darkest
(no signal)
Darkest
(no signal)
Most Light
(saturated
signal)
Most Light
(saturated
signal)
Single
sensing
condition
Sensing window size
adjusted by
Manual Adjust
Output OFF Output OFF
Output OFF
Output ON
Output ON
Darkest Taught
Condition
Lightest Taught
Condition
Position
adjusted by
Manual Adjust
Darkest
(no signal)
Most Light
(saturated
signal)
Output OFF Output ON
2nd Taught
Condition
1st Taught
Condition
Position
adjusted by
Manual Adjust
Figure 4. Dynamic TEACH (Light Operate
shown)
Contrast Values
500+ Excellent: Very stable operation.
100-500
Good: Minor sensing variables will
not affect sensing reliability.
32-99
Low: Minor sensing variables may
affect sensing reliability.
0-31
Marginal: Consider an alternate
sensing scheme.
Figure 5. Contrast Values