Leuze GSU14E User manual

GSU14E
Ultrasonic label fork
Leuze electronic GmbH + Co. KG
[email protected]
In der Braike 1 73277 Owen Tel.: [phone]
We reserve the right to make changes – 2020/04/23 – 50143645
www.leuze.com•

1Bildteil
1
A
B
2
> 12 s
2-7 s
C
B
A
D
+> 7 s
2

3
4
2-7 s
5
> 12 s
3

6
+
< 2 s < 2 s
–
7
> 7 s
+
8
A
B
C
t
HIGH
LOW
t > 100 ms
t ≥ 20 ms
D E
t = 20 … 80 ms
≥ 20 ms
4

9
A
B
T
t
HIGH
LOW
≥ 20 ms ≥ 20 ms
10
5

Intended use
The ultrasonic label forks are ultrasonic sensors for contactless detection of the
gap between two consecutive labels on a carrier tape.
NOTICE
Observe intended use!
This product is not a safety sensor and is not intended as personnel
protection.
ÄOnly allow competent persons to put the product into operation.
ÄOnly use the product in accordance with its intended use.
Function and device operation
The label material used determines the achievable precision and the reliability of
gap detection between labels.
– Light switching: signal in the label gap.
– Dark switching: signal on the label.
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A Label center position
B Label run
ÄTo achieve a high switching accuracy, place the label tape on the lower fork
with slight tension.
ÄAlign the label tape with the "Label center position" marking.
Overview of operating structure
2
A Standard function
Normal operation after switch-on
B Manual teach
Can be executed as dynamic teach
C Set switching behavior (light/dark switching)
D Manual locking/unlocking of the buttons on the device
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GSU14E standard functions
During operation the sensor is always in this function.
The sensor detects label gaps with high precision and speed.
This is indicated by the yellow OUTLED and the switching output.
3
ONLED
green
Constantly ON when operating voltage is applied.
OUTLED
yellow
Indicates the switching signal.
LED is ON if the sensor detects label gaps.
The display is independent of the output setting.
WARNLED
continuous red
light
OFF: error-free operation.
ON: teaching error caused by unfavorable label material.
Manual teach while the label tape is passing through (dynamic)
Preparation: Insert label tape into the sensor.
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ÄPress the teach button until the green ON LED and the yellow OUT LED flash
synchronously.
ÄRelease the teach button.
ÄAllow the label tape to advance through the sensor at a maximum speed of
50m/min. The sensor indicates the belt transport by a more rapid synchro-
nous flashing of the green ON LED and yellow OUT LED.
ÄBriefly press the teach button to end the manual teach. The sensor switches
to the standard function.
Approx. 3…7 labels should be advanced through the sensor in order to achieve
stable switching points. The number of labels to be transported is always based
on the material combination.
If the teach event is faulty (e.g. unfavorable material combination, uneven trans-
port, jittering during transport), the red WARNLED illuminates.
ÄRepeat the teach event.
If the fault cannot be rectified, e.g., via the
easyTune function, the label material
cannot be detected with the device.
NOTICE
During the manual teach process, a 2-point calibration is performed on
the carrier and the label.
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Adjusting the switching behavior of the switching output (light/dark
switching)
5
ÄPress the teach button until only the green ON LED flashes.
ÄRelease the teach button.
The green ON LED flashes for another 2 seconds and the yellow OUT LED
indicates the changed switching behavior for 2 seconds:
– Yellow OUTLED ON: switching output, light switching (signal in the label
gap)
– Yellow OUTLED OFF: switching output, dark switching (signal on the label)
easyTune – Manual fine tuning of the switching threshold
With homogeneous label material, the signal in the gap between twolabels is
much larger compared to the signal on the label.
For the taught switching threshold, there is a high function reserve in both the gap
as well as on the label, and the sensor functions reliably.
To achieve a better function reserve, it can be advantageous to change the taught
switching threshold, especially for inhomogeneous label material.
The sensitivity of the sensor and, thus, the switching threshold can be adjusted
with the
easyTune function, which is in principle comparable to a potentiometer.
6
The sensitivity of the sensor can be adjusted by pressing the teach button (+) or
the minus button (-).
Increase sensitivity:
ÄBriefly press the teach button (+).
ðA single flash of the green ON LED confirms button actuation.
Reduce sensitivity:
ÄBriefly press the minus button (-).
ðA single flash of the yellow OUT LED confirms button actuation.
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Recommended settings
Observation Measure Action
After teaching, the yellow
LED and the switching
output flicker if the label is
moved through the sen-
sor:
The function reserve on
the label is too low.
Reduce sensitivity of the
sensor
(upward shift of the
switching threshold)
Repeatedly press the mi-
nus button (-) briefly until
the sensor detects the
moving label stably and
without interruption.
In rare cases, a highly in-
homogeneous carrier
tape can affect the func-
tional reliability. The yel-
low LED and the switch-
ing output flicker if the
blank carrier tape is
moved through the sensor
without labels:
The function reserve on
the carrier is too low.
Increase sensitivity of the
sensor
(downward shift of the
switching threshold)
Repeatedly press the
teach button (+) briefly
until the sensor detects
the moving carrier tape
without labels stably and
without flickering.
Manual locking/unlocking of the buttons on the device
To protect against erroneous operation, the locking of the buttons is intended to
prevent a button on the device from accidentally being pressed. Accidental button
actuation could unintentionally trigger the
easyTune function or the teaching of the
device.
7
ÄPress the teach button (+) and the minus button (-) simultaneously until the
green ON LED flashes at approx. six times per second.
ÄRelease the teach button (+) and the minus button (-).
ðThe buttons are now locked and can no longer be operated.
ðThe buttons are unlocked using the same button combination.
NOTICE
Manual locking of the buttons on the device is stored in volatile mem-
ory.
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Sensor adjustment via teach input (pin5)
Teach-in
To teach, a teach signal is applied to the teach input (pin 5). The duration of the
teach signal (low level on the teach input) determines the teach-in function.
NOTICE
Before a low level is applied for teaching-in functions, a high level must
be applied for at least 20ms.
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A Buttons locked
B Buttons can be operated
C Teach is started
D Teach duration
Note: During the teach duration, the label tape must be transported through
the sensor (see chapter "Manual teach while the label tape is passing
through (dynamic)").
E Teach is ended
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A Buttons locked
B Buttons can be operated
T Duration of the teach signal
Duration T
[ms]
Function
220…280 Configure the switching behavior of the switching output: light
switching
320…380 Configure the switching behavior of the switching output: dark
switching
420…480 easyTune (-): reduce sensitivity
520…580 easyTune (+): increase sensitivity
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EN

Locking the buttons via the teach input
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Manual locking of the buttons on the device is only suitable for protecting against
tampering to a limited extent since locking can be canceled using the correspond-
ing button combination. For this reason, it is also possible to lock the buttons via
the teach input (pin 5).
– A static high signal (≥ 20ms) on the teach input locks the buttons on the de-
vice so that no manual operation is possible. The buttons can then no longer
be unlocked using the described button combination.
– If the teach input is not connected or if there is a static low signal, the but-
tons are unlocked and can be operated freely.
NOTICE
The buttons can also be locked/unlocked via IO-Link.
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EN