SICK CLV490 Instructions d'exploitation télécharger pdf (Page 114)

Chapter 8 Operating Instructions

CLV 490 Bar Code Scanner

8-12

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SICK AG · Division Auto Ident · Germany · All rights reserved 8 008 796/0000/25-06-2002

Troubleshooting

8.5.3 Malfunctions in Reading mode: result output errors

Check whether the "Device Ready" LED lights up.

If the LED does not light, see

Table 8-5, Page 8-10.

Here: number of bar codes to be read = 1

Malfunction Possible cause Remedy

1. The "Read Result" LED (default setting:

Good Read) does not light up at the end

of the reading pulse.

– The "Result 2" switching output

(default setting: Good Read) is not

outputting a pulse

– The CLV outputs status ST=2 in the

reading result on the host interface

•

Read not successful, since there was no

bar code in the reading field during the

reading pulse

•

Scan line positioned incorrectly

•

Evaluation range of the scan line is

limited unfavourable (CP values)

•

Bar code presented at incorrect reading

distance

•

The presented bar code’s module width

cannot be read by the CLV type being

used

•

With event-controlled focus control:

wrong focus position in Distance Config-

uration choosen.

•

With event-controlled focus control:

trigger source parameterized incorrectly.

•

The bar code is tilted excessively with

respect to the scan line

•

Synchronize read with presence of an

object in reading field. See

Chapter 8.5.2

Malfunctions in Reading mode: reading

trigger errors, Page 8-11

•

Align CLV. Is bar code at center of scan

line? Check the reading quality with the

"CLV-Setup" software. Choose P

ERCEN

-

TAGE

E

VALUATION

. See

Chapter 6.5.2 Per-

centage evaluation, Page 6-22

•

In the "CLV-Setup" program: choose the

R

EADING

C

ONFIGURATION

tab, click the E

DIT

A

UTOFOCUS

respectively D

ISTANCE

C

ONFI

-

GURATION

/A

SSIGMENT

TABLE

button. Are the

min. and max. code position values cor-

rect? Check with S

HOW

CP-

LIMITS

. See

Chapter 6.5.5 Show CP-limits,

Page 6-26

•

Check whether reading distance of bar

code is in the specified reading range?

•

Present a bar code with an acceptable

module width. See

Chapter 9 Technical

data, Page 9-1

•

In the "CLV-Setup" program: choose the

R

EADING

C

ONFIGURATION

tab, click the D

I

-

STANCE

C

ONFIGURATION

/A

SSIGNMENT

T

ABLE

button. Does the focus position match

the distance of the object?

•

In the "CLV-Setup" program: choose the

R

EADING

C

ONFIGURATION

tab, in the

F

OCUS

T

RIGGER

section.

a) Trigger source "Switching input":

Check functional assignment of IN 3 and

IN 4 and connection of the sensors. See

Fig. 5-5, Page 5-17

b) Trigger source: "Serial interface":

Check the data connection to the host.

Use the "CLV-Setup" program to check

the host command strings: choose A

UXI

-

LIARY

I

NTERFACE

tab. Choose M

ONITOR

H

OST

I

NTERFACE

function. See

Chapter 6.5.8 Monitor Host Interface,

Page 6-29

. Download temporarily to

CLV!

c)Trigger source: Timer:

Check switchover time

•

In the "CLV-Setup" program: choose the

C

ODE

C

ONFIGURATION

tab , D

ECODER

sect io n :

choose SMART decoder.

Download all changes to CLV!

Table 8-7: Troubleshooting: result output errors in Reading mode

1 2 ... 109 110 111 112 113 114 115 116 117 118 119 ... 213 214

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