Omron V440-F, User Manual

Page: 491 / 500

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