KEYENCE BL-600 Series - Manual (Page 99)

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Chapter 6 Functions for Reading Operation
6
6.2.2 Multi-label read mode 1 (Multi 1)
Multi-label read mode 1 allows the BL-600 Series to continuously read all of the
several bar codes printed on one label during one trigger input signal.
The BL-600 Series outputs the read data every time one bar code is read.
■ Timing diagram
* The BL-600 Series continuously reads bar codes in the following periods.
• For a “Level signal” trigger ➮ See page 86. :
During the trigger input signal
• For a “One-shot” trigger ➮ See page 87. :
During the preset input time
* It is necessary to set the “Repeat-reading time” ( ➮ See page 42.) to prevent the BL-
600 Series from reading the same bar code twice.
Set the “Repeat-reading time” longer than the time it takes for the read bar code
to go out of the field of the laser beam (100 ms to 25.5 s).
Note: The same type of bar code cannot be read during the specified repeat-
reading time. Different types of bar codes can be read continuously during the
period.
* The OK output turns on every time the BL-600 Series reads a bar code. (Com-
parison to the preset data is not performed.)
The NG output turns on after the trigger input turns off if the BL-600 Series fails
to read any of the bar codes.
Repeat reading time
OK NG
<Succeed to read> <Fail to read>
Trigger input
Bar code
Laser beams
Communication time
OK/NG output OK OK OK