Omron V440-F, User Manual

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F-5
Appendices
V440-F C-Mount Code Reader User Manual
F
-4 T
rig
ger Mod
e and
Filter Duration
F
F-4-1
Trigger
Mode
F-4 Trigger Mode and Filter Duration
Caution:
In automated environments,
Continuous Read 1 Output
is not recommended because there
is typically no reliable way to verify that a symbol was missed.
Note:
If
Trigger Mode
is set to
Continuous Read 1 Output
, the reader will behave as if
Number of
Symbols
were set to
1
, regardless of the user-defined configuration.
F-4-1 Trigger Mode
Definition:
The
Trigger
is the event that initiates a read cycle.
Note:
When calibrating the reader or testing read rate, the current trigger setting will
be disregarded.
Serial Cmd:
<
K200, trigger mode ,leading edge trigger filter,trailing edge trigger filter
>
Default: Continuous Read
Options: 0 = Continuous Read
1 = Continuous Read 1 Output
2 = External Level
3 = External Edge
4 = Serial Data
5 = Serial Data and Edge
Continuous Read
Usage: Continuous Read
is useful in testing symbol readability or reader functions. It is not
recommended for normal operations.
Definition:
In
Continuous Read
, trigger input options are disabled, the reader is always in the
read cycle, and it will attempt to decode and transmit every capture. If a single
symbol stays within read range for multiple read cycles, its data will be transmitted
repeatedly until it leaves the read range.
The reader sends replies to serial commands that require responses when symbol
data is transmitted, or read cycle timeout is enabled and a timeout occurs
and
at
least one captured image has been processed. Depending on the combination of
enabled symbologies, the reader may take longer than the timeout to process a
captured image.
Note: When to Output
and
No-Read
options have no affect on
Continuous Read
.
Serial Cmd:
<
K200, 0
>
Continuous Read 1 Output
Usage: Continuous Read 1 Output
can be useful in applications where it is not feasible to
use a trigger and all succeeding symbols contain different information. It is also
effective in applications where the objects are presented by hand.
Definition:
In
Continuous Read 1 Output
the reader self-triggers whenever it decodes a new
symbol or a timeout occurs.
If
End of Read Cycle
is set to
Timeout
and the symbol doesn’t change, the output
is repeated at the end of each timeout period. For example, if
Timeout
is set to one
second, the reader sends the symbol data immediately and repeats the output at
intervals of one second for as long as it continues to capture the symbol.
If
End of Read Cycle
is set to
New Trigger
, the reader will send the current symbol
data immediately,
but only once
. A new symbol appearing in the reader’s range will
be read and sent immediately, provided it is not identical to the previous symbol.
Serial Cmd:
<
K200, 1
>