Omron 2D CODE READER User Manual page 79

Section 5
Communicating with PC and Programmable Controller
When [Level] is Selected as Trigger Mode and [OK Pulse] is
Selected for [OK/NG Output]
Reading is repeated while the TRIG signal is ON until reading is successful, and
reading is exited when it is successful.
Therefore, this setting executes one output per trigger input.
If the TRIG signal is turned OFF before reading is successful, reading failure will result.
Even if an item other than [NG Pulse] is selected for [OK/NG Output], this signal will perform the
same operation as when [One Shot] is selected.
Power ON
RUN
OFF
ON
TRIG
OFF
ON
BUSY
OFF
ON
Reading in progress (NG)
OK/NG
OFF
ON
(RS-232C)
V400-F050/250/350
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User's Manual
Completion of start-up
Trigger input
Reading in progress (NG) Reading in progress (OK)
Reader is active.
Trigger input
By pulse width
Serial communication in progress
Power OFF
Trigger input