SICK CLV490 Instruções de Operação descarregar pdf (Página 259)

Operating Instructions Chapter 10

CLV490 Bar Code Scanner

Appendix

Reading diagnosis data

Data directly derived from the reading procedure by the CLV490. This data enables the

quality of the read to be assessed. The data is always output on the Ö auxiliary interface

together with the reading result. Only output on the host interface if enabled on the D

ATA

TRING tab in the "CLV-Setup" program (for the CLV490 disabled by default).

Reading field

In start/stop mode the reading field is the area between the start and stopp sensors for the

reading pulse in conveyor direction. In tracking mode the reading field is the area between

the sensor for start/end of an object and the object release point (data output) (parameter-

ized as a distance in conveyor direction), referred to the increments.

Reading field height

Length of the Ö scan line that is available for detecting the bar code in the reading plane.

Due to the V-principle of beam generation, the reading field height is dependent on the

reading distance.

Reading interval

Timeslot in which the CLV490 activates the laser diode and attempts to detect valid bar

codes from the information read. The reading interval may be shorter than the external read-

ing pulse, depending on the selected output mode for the reading result.

Reading pulse

Clock pulse applied externally to the CLV490 to trigger the internal Ö reading interval. Can

be supplied by a photoelectric reflex switch or a command from the host on the serial inter-

face.

Reading range (DOF)

Depth of field about the focal point of the laser beam on two sides. The extent of the reading

range depends on the resolution and reading distance.

Reading result

Electronic representation of the data content of the read bar code together with the Ö read-

ing diagnosis data in one Ö data output string that is generated after the reading pulse has

elapsed. The reading result on the auxiliary interface has a fixed format (content and output

format); the reading result on the host interface can be configured separately for Good

Reads and No Reads. Special characters can also be added if necessary.

Result status output

Function of the four "Result 1" to "Result 4" switching outputs in Reading mode. Signals the

status of the reading result without indicating its contents (e. g. Good Read). You can assign

a status to each output on the D

EVICE FUNCTION tab in CLV490. The "Read Result" LED is

linked to the "Result 2" output.

Scan line

See line scanner.

Sending point

Point at which the reading result is output with respect to the start of the Ö reading pulse

and the internal Ö reading interval.

1 2 ... 254 255 256 257 258 259 260 261 262 263 264 ... 269 270

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