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Chapter 8 Operating Instructions

CLV490 Bar Code Scanner

8-12 © SICK AG · Division Auto Ident · Germany · All rights reserved 8009993/RA61/2007-07-20

Troubleshooting

4. CLV490 does not respond to an

external signal that ends the reading

pulse (sensor input, serial interface)

Reading mode "Start/stop":

Trigger mode: one external sensor

• Incorrect end of reading pulse para-

meterized in the CLV490.

• No signal from the sensor at the

"Sensor“ switching input.

Trigger mode: two external sensors

• If "IN 4“ switching input is choosen as

trigger source for end of reading interval:

no sensor connected or polarity inverted.

• The object does not pass the reading

pulse sensor for trigger start with the

conveyor running.

Trigger mode: serial interface

• Incorrect command used.

• Laser timeout exceeded.

• In the "CLV-Setup" program:

choose the D

EVICE CONFIGURATION tab,

click the R

EADING TRIGGER PARAMETERS

button.

END OF READING INTERVAL section: is "gen-

erated by Trigger Source" selected?

• Check wiring of the sensor

(see Fig. 5-5, Page 5-22).

Measure output signal of the sensor.

• Connect sensor to the "IN 4“ switching

input. Check wiring of the sensor (see

Chapter 5.5.7 Connecting the "Sensor"

switching input, Page 5-22).

Choose the D

EVICE CONFIGURATION tab,

A

SSIGNMENT OF INPUTS section: is "IN 4"

selected (active high or active low)?

Click the READING TRIGGER PARAMETERS but-

ton, E

ND OF READING INTERVAL section: is

"generated by IN 4“ selected?

• Install reading pulse sensor in front of the

CLV490 in conveying direction.

See also Chapter 4.4.2 Mounting the ex-

ternal reading pulse sensor, Page 4-11

• See 2. Remedy

• See remedy in Table 8-5, Page 8-9.

5. CLV490 does not terminate the reading

clock or terminate the clock too late

Reading mode "Tracking":

• Incremental encoder not connected or

connected to the wrong switching input.

• If incremental encoder supplied by

CLV490: encoder not connected to

ground.

• Incorrect reading mode parameterized

in the CLV490.

• Incorrect resolution of incremental en-

coder parameterized in the CLV490.

• No conveyor motion (CLV490 does not

receive incremental signals).

• Laser timeout exceeded.

• Connect incremental encoder to the

"IN4“ switching input. Check wiring

(Fig. 5-6, Page 5-23). Check the output

signal of the incremental encoder.

Choose the DEVICE CONFIGURATION tab,

A

SSIGNMENT OF INPUTS section: IN 4:

"Conveyor increment" selected?

• Insert jumper between pin 5 and pin 15

(CDM490: S 1 switch "SGND_GND").

• In the "CLV-Setup" program:

Choose the D

EVICE CONFIGURATION tab,

READING TRIGGER SOURCE section: "Sensor

Input" selected? I

NTERNAL TRACKING sec-

tion: "active" selected?

• In the "CLV-Setup" program:

I

NTERNAL TRACKING section: "Distance per

encoder pulse" correctly selected?

• Start the conveyor.

• See remedy in Table 8-5, Page 8-9.

Malfunction Possible cause Remedy

Table 8-6: Troubleshooting: reading trigger errors in Reading mode (CLV490 in stand-alone configuration) (contd.)

1 2 ... 149 150 151 152 153 154 155 156 157 158 159 ... 269 270

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