Name: SICK Advanced Series
Brand: SICK
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Operating Instructions Chapter 8

CLV490 Bar Code Scanner

Troubleshooting

8 Troubleshooting

8.1 Overview of possible errors and malfunctions

8.1.1 Mounting errors

• CLV490 aligned incorrectly with the object carrying the bar code (e. g. blanking)

• Reading pulse sensor positioned incorrectly (e. g. internal reading interval starts too

soon or too late)

• With event-controlled focus control: sensors for object height detection positioned

incorrectly

8.1.2 Electrical installation errors

• Interfaces on the CLV490 connected incorrectly (wiring error in CDB420 or CDM490)

8.1.3 Parameter errors

• Functions not adjusted to local conditions, e. g. communication parameters on the host

interface are set incorrectly

• Technical limits of the device exceeded, e. g. relationship between the scanning

frequency and the reading distance

8.1.4 Malfunctions

• Start/stop mode: no external reading trigger, more than one object in the reading field

• Tracking mode: gap between the objects in conveying direction fallen below minimum

• Laser timeout for incorrectly terminated reading pulse exceeded

• Device error (hardware/software)

8.2 Monitoring error and malfunctions

The CLV490 is self-monitoring:

• After the power supply has been switched on, the CLV490 automatically carries out a

self-test, in which it checks important hardware components, before it is initialized

(parameter set loaded and device functions initialized). The self-test can be repeated

at any time by cancelling Reading mode. See Chapter 6.5.13 Self-test, Page 6-57.

• If the CLV490 detects an error during the self-test or at any other time, it outputs the

error status ST= 3 on the host interface. Prerequisite: the error status is enabled for

transmission. This is disabled by default. The CLV490 displays the diagnosed error as

a numeric

combination via the auxiliary interface (see Table 8-1, Page 8-2).

• While it is in operation, the CLV490 constantly monitors the laser diode and speed of

the polygon mirror wheel. In addition, a watchdog circuit responds to error statuses. The

CLV490 carries out referencing at regular cycles. To do so, the laser diode is switched

on for max. 10 s.

• A timer (laser timeout) automatically deactivates the laser diode in Reading mode

("Sensor input" and "Serial interface trigger" mode) if the reading interval has not ended

after 10 minutes (default setting). However, it does not end the reading interval. In this

case, the CLV490 outputs the message:

"Laser safety timeout"

Light Source	LED, visible red light (660 nm)
Protection Class	IP65
Typical Scan Rate	500 scans/s
Ambient Operating Temperature	0 °C ... +50 °C
Power Supply	10 V DC ... 30 V DC

SICK Advanced Series User Manual

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SICK Advanced Series Specifications

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