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Chapter 4 Read Cycle/Trigger

MS-880 Industrial Long Range Scanner User’s Manual 4-15

4–Read Cycle/Trig-

New Trigger

Note: When New Trigger is enabled, Laser On/Off will have no effect. When

noreads occur, the laser will remain on.

Timeout or New Trigger

Timeout Duration

Note: A minimum setting of 2 is recommended.

Note: Timeout or Timeout or New Trigger under End of Read Cycle must be

enabled for Timeout Duration to take effect.

Definition: 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” trig-

ger.

With either External Edge, Serial, or Serial or 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.

(See figure 4-1 on page 4-6 and figure 4-2 on page 4-7.)

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

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

Definition: Timeout or New Trigger is identical to Timeout, except that a time-

out or a new trigger (whichever occurs first) ends the read cycle.

Usage: Useful in applications that require an alternative way to end the read

cycle. For example, if an assembly line should stop completely or the

intervals between objects are highly irregular.

Definition: Timeout Duration is the time span of the read cycle and is repre-

sented in 10 mS increments. It is used in conjunction with External

Edge or Serial Trigger.

Usage: It is useful in many tightly controlled applications which require a read

cycle to end before the next object appears and therefore need the

flexibility of a timeout adjustment.

Serial Cmd: <K220,end of read cycle status,timeout>

Default: 100 (Corresponds to one second or 1000 ms.)

Options: 0 to 65535. (Divide any positive number entered by 100 to determine

the time in seconds.)

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Microscan MS-4X Manual do Utilizador Página 81