Omron V440-F User Manual page 491

Appendices
That of V440-F depends on the cell size (bar width) of a target code too.
What is the readable The reference values are described on page A-5 to A-6, refer to them.
installation distance? The read range is described, which was possible to read with typical cell size examples for the design readable focal
distance per format.
* For barcode, a half size of the bar width for readable values of 2D code cell size is a guide.
Please consider below.
• Construct appropriate optical conditions like an image is in focus or having sufficient contrast.
How to shorten the read Mount distance, Mount angle, Exposure time)
time? • Limit symbol types for the read target.
• Enable the optimization. (Graph icon on the setup screen)
• Perform the Window of Interest.
Adjust the following parameters.
An image is dark.
Out of focus.
A cell size is small.
What parameters need to
be adjusted when a
symbol is unable to
Noisy background
read?
The read time takes much
time.
The lighting is reflected.
It is 3,000 characters.
What is the number of
It is divided by the number of registrations, so it varies depending on the number of registrations.
the maximum characters
When the number of registrations is one, it can register up to 3,000 characters.
for Match String
When the number of registrations is ten, each registration can register up to 300 characters.
Database?
Related Q&A: What is the number of the maximum readable characters?
Use <K231> command.
Command format: <K231, index, master symbol data>
How to change Match
Example:
String externally?
When setting ABC to the first Match String Database:
<K231, 1, ABC>
How to enable the Set the Trigger Mode except for Continuous Read. Refer to the following instruction.
External Trigger rather
than Continuous Read? Select Gear icon - Advanced - Read Cycle - Trigger - Mode - External Edge or Serial Data and Edge.
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 can I confirm the • When using a Big (101) assembly;
OK/NG Read result over There is a way to verify the External Output Status OUTPUT bit.
EtherNet/IP? Please note that the External Output Status is dependent on the Output condition setting for the Parallel I/O 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.
R-6
Symbol state
Adjust Exposure or Gain to bright the image.
Adjust Focus to make the symbol in focus.
Change the mount distance or use a high pixel density and narrow
field of view type.
Remove noise with the Morphological Preprocessing. When 5 M
type is used, adjust the color filter.
Set Timeout longer.
Tilt the lighting by approx. 15 degrees to reduce the reflection. Or,
try to use the optional Polarizer (V430-AF12) and the Diffuser
(V430-AF11).
Adjustment
V440-F C-Mount Code Reader User Manual