Chapter
8
Operating instructions
ICR 84x Image Code Reader
8-6
©
SICK AG · Division Auto Ident · Germany · All rights reserved
8 010 961/0000/10-05-2005
Troubleshooting
8.5.2
Malfunctions in Reading mode: Reading pulse errors
Prerequisite
The “Device Ready“ LED lights up. If not, see
.
Fault
Possible cause
Remedy
1. Pulse mode: “
sensor 1“ input
(external sensor).
The ICR cannot be pulsed:
– the “Laser On“ LED does not light up
– the red illumination field (pulsed) does
not appear
•
Sensor not connected or connected to
incorrect switching input
•
If sensor supplied by ICR: sensor not
connected to ground potential
•
Incorrect reading pulse source
parameterized on the ICR
•
Polarity of the Sensor 1“ switching
input inverted
•
Incorrect debouncing of the “Sensor 1“
switching input parameterized on the ICR
•
Incorrect delay of the “Sensor 1“
switching input parameterized on the ICR
•
Photoelectric switch not aligned with the
reflector (photoelectric proximity switch/
inductive sensor not dampened)
•
The object does not pass the reading
pulse sensor for trigger start with the
conveyor running
•
Connect sensor to “Sensor 1“ switching
input. Check sensor wiring (see
Chapter 5.5.8 “Connecting the “Sensor
1“ switching input“, Page 5-13
Measure output signal on sensor.
•
Insert jumper between pin 5 and pin 15.
(CDB 420: switch S3 “SGND-GND“,
CDM 420: switch S6 “SGND-GND“)
•
Check in the CLV Setup program:
Select the D
EVICE
C
ONFIGURATION
tab, click
the R
EADING
T
RIGGER
P
ARAMETERS
button,
S
TART
OF
READING
INTERVAL
group:
“Sensor input“ selected? (active high:
reading pulse starts when power
applied)
•
Check in the CLV Setup program:
Select the D
EVICE
C
ONFIGURATION
tab,
S
ENSOR
1 group: N
OT
INVERTED
selected?
(Active high: current at input starts
reading interval, active low: reading
interval starts when power removed)
•
Check in the CLV Setup program:
Select the D
EVICE
C
ONFIGURATION
tab,
S
ENSOR
1 group: debouncing:
selected
value too small/large?
•
Check in the CLV Setup program:
Select the D
EVICE
C
ONFIGURATION
tab, click
the R
EADING
T
RIGGER
P
ARAMETERS
button,
S
TART
D
ELAY
group: Values set by
mistake?
Time controlled: selected value too high?
Track controlled: incremental encoder
connected to “Sensor 2“ input, ICR
parametrized correctly?
•
Align sensor.
Check functioning.
•
Install the reading pulse sensor in front of
the ICR in conveyor direction. See also
Chapter 4.4.2 “Installing the external
reading pulse sensor“, Page 4-9
Table 8-4: Troubleshooting: Reading pulse errors in Reading mode