SICK CLV 420, Руководство по эксплуатации

Страница: 35 / 146

Operating Instructions Chapter 4
CLV 42x bar code scanner
Installation
8 009 981/O078/16-08-2004
©
SICK AG · Division Auto Ident · Germany · All rights reserved
4-7
4.3 Installing and adjusting the device
4.3.1 Installing the CLV
1. Prepare the base for installing the bracket as described in Chapter 4.2.2 Laying out
accessories, Page 4-1 .
2. Place the object containing the bar code within the visible range of the CLV (in the
position at which it is to be read) with the conveyor belt switched off.
3. Align the CLV with the bar code (in accordance with the scanning method) in such a way
that
– with the line/raster scanner, the narrow end with the LED indicators is almost parallel
with the bar code surface
– with the line/raster scanner with angle attachment, the wide side with the laser
warning labels is almost parallel with the bar code surface
All of the possible reading angles must be taken into consideration. See Fig. 4-6,
Page 4-5 .
4. If relevant to the evaluation, pay attention to the count direction of the code position if
applicable. See Fig. 4-8, Page 4-6 .
5. Install the CLV bracket on the base.
Risk of damage to the device
The maximum depth of engagement of the two tapped blind holes M4 is 6 mm (0.24 in).
Longer screws will damage the device.
Use screws with the correct length.
6. Screw the M4 screws through the bracket into the tapped blind holes of the CLV.
7. Tighten the screws slightly.
8. Adjust the CLV as described below.
4.3.2 Adjusting the CLV
The "percentage evaluation" mode supports the adjustment of the CLV. In this mode, the
CLV displays the quality of the bar code reads that enter the CLV reading field statically (the
object is not moved on the conveyor belt). The CLV performs 100 scans in Free Running
mode and evaluates the reading quality statistically. It outputs the reading result
continuously every 2 s via the terminal interface.
The behavior of the "Result" LED also indicates the reading quality:
•
If the LED does not light up, the CLV cannot read the bar code
(reading quality < 30 %).
•
If the LED blinks, the CLV is having problems reading the bar code
(reading quality 30 % to 90 %).
•
When the LED lights up constantly, the CLV is aligned optimally
(reading quality > 90 %). The scanning frequency in the default setting is 700 Hz.
1. Connect the CLV to the CDB 420 or CDM 420 connection module and switch on the
power supply to the module (s ee Chapter 5.5.3 Connecting the power supply,
Page 5-5 ).
Once the CLV has started, it outputs a tone to indicate that the self-test was
successfully completed. Shortly afterwards, it outputs two tones to indicate that it has
assumed Reading mode. The "Device Ready" LED lights up.