Serial Data; Trigger Filter Duration - Microscan QX Hawk User Manual

Read Cycle

Serial Data

Serial Data is effective in a highly controlled environment where the host knows precisely
when the object is in the field of view. It is also useful in determining if a No Read has
occurred.
In Serial Data, the imager accepts an ASCII character from the host or controlling
device as a trigger to start a read cycle. A Serial Data trigger behaves the same as an
External Edge trigger.
Serial commands are entered inside angle brackets, as shown here: <n>.
Note: In Serial Data, sending a non-delimited start serial character will start a read cycle;
however, a non-delimited stop serial character has no effect.
Serial Data and Edge
Serial Data and Edge is seldom used but can be useful in an application that primarily
uses an external sensing device but occasionally needs to be triggered manually.
An auxiliary terminal can be connected to the auxiliary port so the user can send the serial
trigger character through the imager to the host.
In this mode the imager accepts either a serial ASCII character or an external trigger pulse
to start the read cycle.
Note: In Serial Data, sending a non-delimited start serial character will start a read cycle;
however, a non-delimited stop serial character has no effect.

Trigger Filter Duration

Leading Edge
Used to ignore accidental triggers when
To consider a change in state on the trigger input, the level must be stable for the trigger
filter duration. In an edge mode, the imager will trigger a read cycle if the active state has
been uninterrupted for the entire trigger filter duration. In a level mode, the leading edge is
filtered such that on an active edge, the state must be held interrupted for the trigger filter
duration before a trigger will occur.
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Trigger Mode is set to
QX Hawk Industrial Imager User's Manual
External Edge or External Level.