Datalogic PowerScan BT8300 Family, Руководство по продукции

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REFERENCES
Product Reference Guide 139
When one read per cycle is selected, the device decodes only one code during the ON period and immediately turns the
reader OFF. It is only possible to read another code when the next ON time occurs.
In multiple reads per cycle , the ON period is extended so that the device can continue decoding codes until an OFF
event occurs. For software trigger mode, the
flash on
period is immediately reset after each read and therefore extended.
If another code is decoded before the reset
flash on
period expires, it is again reset and the effect is that the device
remains ON, decoding codes until the
flash on
or
timeout
period expires.
The Safety Time parameter should be used in this case to avoid unwanted multiple reading of the same code, see par.
5.5.5.
5.5.5 Safety Time
Safety time prevents the device from immediately decoding the same code more than once. Same code consecutive
reading can be disabled requiring the reader to be removed from the code (no decoding) for at least 400 ms, or a timeout
can be set up to 9.9 seconds before the decoder will accept the same code. Reading is immediate if the code changes.
The safety time parameter is not applicable when reading stacked codes or when setting one read per cycle in hardware
trigger operating mode, since these settings require voluntary action by the user.
5.6 Decoding Parameters
These parameters are intended to enhance the decoding capability of the reader for
particular applications. Used incorrectly, they can degrade the reading performance or
increase the possibility of a decoding error.
CAUTION
5.6.1 Ink-Spread
The ink-spread parameter allows the decoding of codes, which are not perfectly printed because the page texture tends to
absorb the ink.
5.6.2 Overflow Control
The overflow control parameter can be disabled when decoding codes printed on small surfaces, which do not allow the
use of an overflow space.
This command does not affect code families 2/5, Code 128 and Code 93.
5.6.3 Interdigit Control
The interdigit control parameter verifies the interdigit spacing for code families Code 39 and Codabar.
5.7 Advanced Formatting
5.7.1 Match Conditions
Selecting an Advanced Formatting and specifying a Match restriction (Code Type, Code Length, Predefined Characters)
the code will be transmitted according to the order of the defined formats.
For example, defining 2 formats where:

Format 1: Match Code type = Code128

Format 2: Match Code length = 15 and Match with Predefined Characters “DATA”
a Code128 “DATA:12345ABCDE” with code length 15 will be formatted following the Format 1.
To send the same code with the Format 2 it is necessary to invert the format order as follows:

Format 1: Match Code length = 15 and Match with Predefined Characters “DATA”

Format 2: Match Code type = Code128