Microscan Quadrus MINI Imager, Руководство пользователя

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Quadrus MINI Imager User’s Manual
5-15
Read Cycle
End of Read Cycle
End of Read Cycle Mode
Note:
When operating in Continuous Read or Continuous Read 1 Output, the imager is
always in the read cycle.
Timeout
Definition: The read cycle is the time during which the imager 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.
Serial Cmd: <
K220,end of read cycle
,read cycle timeout >
Default:
Timeout
Options:
0 = Timeout
1 = New Trigger
2 = Timeout or new Trigger
3 = Last Frame
4 = Last Frame or New Trigger
Usage: 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.
Definition:
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.