Leuze electronic GmbH + Co. KG
In der Braike 1 D-73277 Owen Tel. +49 (0) 7021 573-0
AKS 171.2… - 01
[email protected] • www.leuze.com
Setting
Before adjusting, the transmitter and receiver must be aligned as described in sections "Preparations" and "Alignment."
Objectives:
Adjust the transmitter and receiver so that the required sensitivity is achieved.
Reliable, fault-free detection of small objects.
1.
Set switch
⑥
on the receiver to the minimum object size (position '
4
').
2.
Turn the potentiometer
③
on the transmitter clockwise at least 4 full rotations (maximum position).
3.
With the light axis free, slowly turn potentiometer
③
counterclockwise until the red illumination LED
⑧
just switches off (at max-
imum distance between transmitter and receiver (1700 mm), this is, under certain circumstances, the case even without turning
back the potentiometer).
4.
Interrupt and again clear the light axis several times to check whether the red illumination LED
⑧
reliably switches off each time.
5.
If not, turn potentiometer
③
on the transmitter counterclockwise approx. ¼ turn and repeat the previous step.
6.
The system is correctly adjusted if:
- all 3 yellow LEDs of the alignment indicator
⑦
illuminate
- the red LED
⑧
does not illuminate with free light paths (it may, however, illuminate if objects are in the light path).
7.
Transmitter:
remount potentiometer cover on the potentiometer
③
.
Receiver:
use switch
⑥
to set object size.
Function test
1. Transmitter
:
green LED
①
and yellow LED
②
must illuminate.
2. Receiver
If light path is free
:
- Red LED
④
(signal) must illuminate constantly (not flash).
- All 3 yellow LEDs in the alignment indicator
⑦
illuminate.
- Red LED
⑧
(illumination indicator) must not illuminate.
If there are objects in the light path
:
- Yellow LED
⑤
(state output on receiver) illuminates -> object detected.
- Red LED
④
(receiver signal strength) on the rear side of the receiver switches off while large objects
1)
are located in the light
path. For smaller objects, it illuminates constantly or flashes.
- Red LED
⑧
(illumination indicator) illuminates upon detection; is dark, however, if the light path is free.
Trouble shooting
1) Large object = light path is fully or largely darkened.
Fault image
Error
Possible remedy
Sensor: both LEDs
①
,
②
off
Supply voltage missing or polarity
reversed or transmitter defective
Check power supply unit / wiring, exchange device
if necessary and send to manufacturer for repair.
Transmitter: green LED
①
illumi-
nates, yellow LED
②
off
Transmitter deactivated
Connect pin 4 (black wire) to pin 3 (blue wire) or
isolate pin 4 (black wire).
Receiver: both LEDs
④
,
⑤
dark
Supply voltage missing or receiver
defective
Check power supply unit / wiring; replace receiver
if necessary.
Red LED
④
(signal indicator) off, yel-
low LED
⑤
illuminates continuously,
switching output active
No or very weak signal received from
transmitter (light path interrupted,
large object, massive soiling, potenti-
ometer
③
on transmitter misadjusted)
or transmitter without supply or trans-
mitter defective or transmitter/receiver
alignment very bad
Check whether light path is free, check whether
transmitter is active (both LEDs
①
,
②
on).
Check transmitter adjustment (potentiometer
③
)
and alignment.
Red LED
④
(signal indicator) flashes,
yellow LED
⑤
off
Object in the light path, weak recep-
tion signal, sensor is at the function
limit but still just managing to function
Check whether light path is free. Clean optics with
lint-free cloth and alcohol, check alignment, check
potentiometer adjustment
③
on transmitter.
AKS 171.2
Ejection monitoring
