REFERENCES

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. 5.6.5.

5.6.5Safety 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.

5.7DECODING 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

CAUTION

decoding error.

 

5.7.1Ink-Spread

The ink-spread parameter allows the decoding of codes, which are not perfectly printed because the page texture tends to absorb the ink.

5.7.2Overflow 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.

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