End Of Read Cycle - Microscan MS-9 User Manual

End of Read Cycle

Note: When to Output must be set to End of Read Cycle before this command can
be active.
Definition: The read cycle is the time during which the scanner will attempt to read
and decode a symbol. At the end of a read cycle the scanner stops read-
ing symbols and sends the symbol data or noread message to the host.
End of Read Cycle Mode
Definition: A read cycle can be terminated by a new trigger, a timeout, or a combina-
tion of both.
Serial Cmd: <K220,end of read cycle
Default:
Timeout
Options: 0 = Timeout
1 = New Trigger
2 = Timeout & New Trigger
Note: When operating in Continuous Read or Continuous Read 1 Output, the scan-
ner is always in the read cycle.
Timeout
Usage: Typically used with Serial or Edge and Continuous One.
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 bar coded object appears, giving the system extra
time to decode and transmit the data to the host.
Definition: Timeout ends the read cycle when the time set in Timeout elapses or
"times out."
If in Continuous Read 1 Output, a timeout initiates a new read cycle
and allows the same symbol to be read again.
With either External Edge, Serial Data, or Serial Data & Edge
enabled, a timeout ends the read cycle and symbol data or a noread mes-
sage is sent to the host.
With External Level enabled, the read cycle does not end until the fall-
ing edge trigger or a timeout occurs. The next read cycle does not begin
until the next rising edge trigger.
New Trigger
Usage: New Trigger is an effective way to end a read cycle when objects move
past the scanner at irregular intervals (not timing dependent).
mode,read cycle timeout>
MS-9 Scanner User's Manual
Chapter 4 Read Cycle
4-13