Microscan MS-96 Manual de usuario descargar pdf (Pagina 61)

Chapter 4 Read Cycle

MS-9 Scanner User’s Manual 4-13

End of Read Cycle

Note: When to Output must be set to End of Read Cycle before this command can

be active.

End of Read Cycle Mode

Note: When operating in Continuous Read or Continuous Read 1 Output, the scan-

ner is always in the read cycle.

Timeout

New Trigger

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.

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 mode,read cycle timeout>

Default: Timeout

Options: 0 = Timeout

1 = New Trigger

2 = Timeout & New Trigger

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.

Usage: New Trigger is an effective way to end a read cycle when objects move

past the scanner at irregular intervals (not timing dependent).

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Microscan MS-96 Manual de usuario Pagina 61