KEYENCE BL-600 Series - Manual (Page 98)

Chapter 6 Functions for Reading Operation
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6.2 Read Modes
The BL-600 provides 4 types of read modes.
6.2.1 Single label read mode
The single label read mode allows the BL-600 Series to read only one bar code
during one trigger input signal.
■ Data output timing
The BL-600 Series offers the following two data output modes to send data and
output OK/NG signals. Select an appropriate mode according to the application.
Typically, “After Read” is selected.
● After Read ➮ See page 42.
The BL-600 Series sends read data and outputs an OK/NG signal after a
successful read.
This is the operation described in “6.1.1 Scanning methods” on page 86 and
87.
● At trigger input ➮ See page 42.
The BL-600 Series sends read data and outputs an OK/NG signal at the
following timings.
• For a “Level signal” trigger ➮ See page 86. :
When the trigger input turns off
• For a “One-shot” trigger ➮ See page 87. :
After the preset input time has passed
* The timing diagram above shows the case for a “Level signal” trigger.
OK/NG NG
Trigger input
Bar code
Laser beams
Communication time
OK/NG output