Omron MicroHAWK V320-F User Manual page 495

Appendices
Parallel
communications
timing chart
How to estimate an
exposure time when
reading a moving
symbol?
R-4
The parallel output signals, OUTPUT1/OUTPUT2/OUTPUT3, can change those roles by the output
condition settings.
The default is that those are turned on when all are No-Read.
WebLink - Gear icon - Advanced - I/O - OUTPUT1 parameters - Output On
Additionally, a timing to turn off can also be adjusted using the following setting.
WebLink - Gear icon - Advanced - I/O - OUTPUT1parameters - Output Mode
When you want to detect a timing that the output is changed, set the output condition for one of
OUTPUT1/OUTPUT2/OUTPUT3 to In Read Cycle.
According to the setting, it turns on in a period from detecting a trigger, reading, and end of output.
For example, the following describes a timing chart in a case of a setting below.
• Output On
OUTPUT1 In Read Cycle
OUTPUT2 Match or Good Read
OUTPUT3 Mismatch or No-Read
• Timing chart
<Output Mode: Pulse case>
ON
TRIG
OFF
ON
OUTPUT1
In Read Cycle
(In Read Cycle)
OFF
ON
OUTPUT2
(Good Read)
OFF
ON
OUTPUT3
(Good Read)
OFF
<Output Mode: Latch Mode 2 (Status held) case>
ON
TRIG
OFF
OUTPUT1 ON
(In Read Cycle) In Read Cycle
OFF
ON
OUTPUT2
(Good Read)
OFF
ON
OUTPUT3
(No Read)
OFF
<Output Mode: Latch Mode 3 (OFF at In Read Cycle started) case>
ON
TRIG
OFF
ON
OUTPUT1
In Read Cycle
(In Read Cycle)
OFF
ON
OUTPUT2
(Good Read)
OFF
ON
OUTPUT3
(No Read)
OFF
A moving amount of a symbol during exposure should be 1/10 or less of the cell size (for barcode,
narrow bar width).
When a cell size is C [mm] and a line speed is L [mm/s], use the following formula to get the
exposure time S.
S ≤ 0.1×C/L
For example, When a cell size is 0.3 [mm] and a line speed is 300 [mm/s], the exposure time should
be 100 [μs] or less.
0.1×0.3 [mm]/300 [mm/s] = 100 [μs]
MicroHAWK V320-F / V330-F / V420-F / V430-F Barcode Reader User Manual
In Read Cycle
These are almost simultaneous, however, In Read Cycle
is going to be turned OFF after starting the results output.
On Good Read
Pulse Width
setting time: ON
In Read Cycle
These are almost simultaneous, however, In Read Cycle
is going to be turned OFF after starting the results output.
On Good Read
ON status is held until No Read occurs.
In Read Cycle
These are almost simultaneous, however, In Read Cycle
On Good Read
is going to be turned OFF after starting the results output.
ON status is held until In
Read Cycle is started.
No Reads
Pulse Width
setting time: ON
No Reads
ON status is held until No Read occurs.
No Reads
ON status is held until In
Read Cycle is started.