Datalogic Scanning 90ACC1780 Manuel D’Utilisation

REFERENCES 

 
When this timeout is selected, the reader turns OFF automatically after the desired 
period of time. 
 
 

 
In general, a reading cycle corresponds to the ON + OFF times of a device. 
The resulting effects of this parameter on code reading depend on other related 
configuration conditions. Here are the definitions of ON and OFF times. 

 

• 

For readers using the software trigger parameter (FLASH MODE), a reading 
cycle corresponds to the flash on + flash off times. Code reading takes place 
during the flash on time. 

 

• 

For readers using the hardware trigger parameter, a reading cycle corresponds 
to a trigger press (ON) + one of the following OFF events: 

trigger release (for trigger active level) 
a second trigger press (for trigger active pulse) 
trigger-off timeout

 (see par. 5.5.3). 

 

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. 
 
 

 
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.