Name: SICK Advanced Series
Brand: SICK
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Chapter 3 Operating Instructions

CLV490 Bar Code Scanner

Product description

In autofocus mode and in combination with the OTS400 Omni Tracking System the CLV490

can also use the object height information from the OTS400 or any other CLV490 transmit-

ted via the CAN bus.

3.2.2 Event-controlled dynamic focus control

As an alternative to the autofocus function, the CLV490 can switch its focus position in re-

sponse to certain events and thus dynamically cover a large reading range. A maximum of

eight reading ranges can be defined as distance configurations for this purpose and ap-

proached consecutively in reading mode (see Fig. 3-4).

The switch over takes place in response to changes in the object distance (with reads from

above: object height detection). The trigger source for the switchover can be:

• A signal combination at the "IN 0" to "IN 4" switching inputs, a command on the host

interface/auxiliary interface or the integrated timer (e. g. for search mode). Additional in

the case of the line scanner with oscillating mirror also the oscillating mirror reversal

points. The distance configurations are assigned to the switchover sequence by means

of a programmable assignment table.

• In combination with the OTS400 Omni Tracking System:

Alternatively the object height information from the OTS400 or any other CLV490 via

the CAN bus.

The object distance measurement of the autofocus function can be additionally used to de-

fine the distance configurations.

3.2.3 Reading modes of the CLV490 in stand-alone configuration

Start/stop mode

During the reading process, only one object is located in the reading field in start/stop

mode, i. e. all read bar codes can be clearly assigned to the object. As default, two reading

pulse sensors at the beginning and at the end of the reading field control the starting and

stopping of the reading process (Fig. 3-5). The size of the reading field is determined by the

distance between the two sensors. Alternatively, the reading process can be controlled with

Fig. 3-4: Dynamic focus control: classification of the reading range in distance configurations

123 5 8

6 7

Reading

field height

Focus

position

Reading distance

Focus position

Reading distance

DC = Distance Configuration

DC 1

DC 3

DC 4

DC 6

DC 7

DC 8

DC 2

DC 5

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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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