Omron V460-H User Manual page 413

8 Troubleshooting
In ideal, a barcode with the size below is readable.
Barcode width: 1 pixel or more
What is the smallest
Barcode height:16 pixels or more
readable 1D barcode?
These figures are theoretical values. See Section 1-3-2 Code Readability Tables for more detailed
information.
What is the maximum The V460-H can read up to the maximum numbers defined each code standard.
number of readable For example, although up to 7,089 characters can be input to QR code based on the standard, the V460-H
characters? can read the code.
What is the ideal That of V460-H depends on the cell size (bar width) of a target code too.
reader-to-symbol The reference values are described in sections 1-3-1 and 1-3-2.
distance for the best The read range is described, which was possible to read with typical cell size examples for the design
possible decode readable focal distance per format.
performance? * For barcode, a half size of the bar width for readable values of 2D code cell size is a guide.
How can I minimize
Please refer to Section 3-1 – V460-H Scanning for information about how to shorten read time.
decode time?
Adjust the following parameters.
Symbol state
An image is dark.
Out of focus.
A cell size is small.
What parameters
need to be adjusted Noisy background
when the reader fails
to decode a symbol?
The read time takes
much time.
The lighting is
reflected.
It is 3,000 characters.
What is the maximum
It is divided by the number of registrations, so it varies depending on the number of registrations.
number of characters
When the number of registrations is one, it can register up to 3,000 characters.
supported by Match
When the number of registrations is ten, each registration can register up to 300 characters.
String Database?
Related Q&A: What is the number of the maximum readable characters?
Use <K231> command.
How do I change
Command format: <K231, index, master symbol data>
Match String from
Example:
outside of the
When setting ABC to the first Match String Database:
WebLink interface?
HH
<K231, 1, ABC>
The method differs according to the selected input assembly.
• When using a Small (100) assembly;
First determine whether the Output String (DECODE DATA STRING) is NOREAD (default).
How do I confirm • When using a Big (101) assembly;
Good Read / No Read There is a way to verify the External Output Status OUTPUT bit.
results over Please note that the External Output Status is dependent on the Output condition setting for the Parallel I/O
EtherNet/IP? OUTPUT signal. The default setting is ON when there is a Read Fail.
• When an assembly after MXL/SLC (102) is selected;
You can verify the Read Cycle Pass, Read Cycle Fail bit status in Device Status. The Read Cycle Pass,
Read Cycle Fail bit is OFF during a READ cycle and is updated when Data Is Ready is ON.
8-6
Adjustment
Adjust Exposure or Gain to bright the image.
Adjust Focus to make the symbol in focus.
Reduce the distance between the symbol and the V460-H.
Remove noise with the Morphological Preprocessing.
In Advanced Settings (WebLink
mance. For example, enable the Pixel Binning option (Cam-
era Setup), enable only the symbol types (Symbologies)
that will be used, etc.
Tilt the lighting by approx. 15 degrees to reduce the reflection.
V460-H Industrial Handheld DPM Reader User Manual
), optimize decode perfor-
HH