End Of Read Cycle - Omron MicroHAWK V320-F User Manual

F-9

End of Read Cycle

Definition:
F-9-1 End of Read Cycle Mode
• Note: When operating in Continuous Read or Continuous Read 1 Output, the reader is always in the read cycle.
Serial Cmd:
Default:
Options:
Timeout
Usage:
Definition:
New Trigger
Usage:
Definition:
MicroHAWK V320-F / V330-F / V420-F / V430-F Barcode Reader User Manual
The read cycle is the time during which the reader will attempt to capture
and decode a symbol. A read cycle can be ended by a timeout, a new
trigger, or by the last frame in a capture sequence or a combination of the
above.
<K220,end of read cycle,read cycle timeout>
Timeout
0 = Timeout
1 = New Trigger
2 = Timeout or new Trigger
3 = Last Frame
4 = Last Frame or New Trigger
Typically used with Serial Data or External Edge and Continuous Read
1 Output.
It is effective in highly controlled applications when the maximum length of
time between objects can be predicted. It assures that a read cycle ends
before the next symbol appears, giving the system extra time to decode
and transmit the data to the host.
Timeout ends the read cycle, causing the reader to stop reading symbols
and send the symbol data or No-Read message when the time set in Timeout
elapses (times out), if When to Output is set to End of Read Cycle.
If in Continuous Read 1 Output, a timeout initiates a new read cycle and
allows the same symbol to be read again.
With External Edge, Serial Data, or Serial Data or External Edge
enabled, a timeout ends the read cycle and symbol data or a No-Read
message is sent to the host.
With External Level enabled, the read cycle does not end until the falling
edge trigger occurs or a timeout occurs. The next read cycle does not begin
until the next rising edge trigger.
New Trigger is an effective way to end a read cycle when objects move
past the reader at irregular intervals (not timing-dependent).
New Trigger ends the current read cycle and initiates a new one when a
new trigger occurs. New Trigger refers only to a rising edge trigger.
With External Edge, Serial Data, or Serial Data or External Edge
enabled, an edge or serial trigger ends a read cycle and initiates the next
read cycle.
In the case of External Level, a falling edge trigger ends the read cycle but
the next read cycle does not begin until the occurrence of the next rising
edge trigger.
Appendices
F
F-13