Microscan Quadrus EZ, Руководство пользователя, Страница: 66 / 366

3-12
Quadrus EZ Reader User’s Manual
Trigger
Trigger Filter Duration
If the unit is in External Edge trigger mode, then Trigger Filter Duration specifies the time
following an edge that the reader will not consider another edge as a valid trigger.
If the unit is in External Level mode, then Trigger Filter Duration specifies the time following
the active edge that the trigger must be sampled once again as active before considering
it a valid level trigger.
External Trigger State
Note: External Level, External Edge, or Serial Data or Edge triggering mode must be
enabled for External Trigger to take effect.
Usage:
Trigger Filter Duration can be used to help the unit trigger more consistently
with an unstable external trigger.
Definition:
Trigger Filter Duration can prevent trigger bounce from falsely triggering
the reader by limiting the time during which trigger pulses can be received.
Serial Cmd: < K200, trigger mode, trigger filter duration >
Default: 313 (x 32µs = 10.24mS)
Options: 0 to 65535 (corresponding to 0 to 2.097seconds in 32µs steps)
Usage:
Allows users to select the trigger state that will operate with their systems.
(If using an object detector, use Active Off.)
Definition:
When enabled for Active On (I
ON
) the triggering device imposes a current
on the optoisolator to activate the read cycle. When enabled for Active Off
(I
OFF
) the triggering device interrupts the current to the optoisolator to
activate the read cycle.
Serial Cmd: < K202,external trigger state >
Default: Active On
Options: 0 = Active Off 1 = Active On