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MS-3 Laser Scanner User’s Manual 4-1

4–Read Cycle/Trig-

Read Cycle/Trigger

Chapter Contents

Read cycles and triggering modes are at the heart of bar code scanning. After you’ve

established communications and completed basic read rate testing, you will need to

address the spatial and timing parameters associated with your application. In a typi-

cal operation a bar coded item moves along a line past a scanner. A trigger or timer

activates a read cycle during which the scanner actively searches for symbols. You will

need to decide how to initiate the read cycle and how and when to end it. This section

addresses these issues.

Note: The characters NULL <> and , can only be entered through embedded menus,

not through ESP or serial commands.

Note: You can learn the current setting of any parameter by inserting a question

mark after the number, as in <K100?> To see all “K” commands, send <K?>.

Chapter

Trigger Mode ...........................................................................................4-4

Trigger Filter Duration..............................................................................4-9

External Trigger State............................................................................4-10

Serial Trigger Character ........................................................................4-11

Good Decode Reads .............................................................................4-14

Beeper Output .......................................................................................4-15

Read Cycle ............................................................................................4-16

Multisymbol............................................................................................4-19

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Microscan MS-4 Especificaciones Pagina 49