Extended Pid List - Microscan HawkEye HE1510-M User Manual

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For additional information about Retry Modes, see "Retry Modes" on page 3-6.

Extended PID List

The PID List and PID List w/Acquire retry modes allow up to 15 PIDs with
specific decoder settings to be tried. The additional PID list entry slots become
visible in the user interface as they are populated. A value of 0, at any point,
terminates the list
Note: The camera is sent the entire, defined list, but will only process retries on
PIDs up to the point that it sees the first 0 in the list.
There are two modes of retry list operation:
• PID List — A single image acquisition is performed and decodes are
attempted using the settings for each PID in the list, always starting at the
first and working through to the end of the list. For performance reasons, it is
important to order the list in terms of diminishing probability of decode
success so that the chance of decode on the first one or two PIDs will be
optimized. Subsequent reads proceed from the list position that the last read
finished on.
• PID List w/Acquire — Cycles through the PID list, taking new images until
a successful Acquire/Decode pair happens.
Both modes have process specific considerations that need to be taken into
account before choosing which mode best suits a specific application.
For example, if the resulting Data Valid line controls when to move a conveyor
belt to advance to the next part, you would not want to do a re-acquire, as the part
would move on without trying the other PIDs. In this case, you would want to run
without acquire so that all the PIDs are tried on the one image, and then give one
final result.
v2.4.1, Nov 2008
Light — Allows up to 2 retries using optionally different Decoder
parameters. On the second retry, a new picture is taken using the same
photometry parameters; however the lighting and/or strobe mode can be
specified directly in the UI. This mode is a subset of the RETRY PID
List w/Acquire mode. This mode retries in the order PID0 with Lighting
ON, and then PIDn with External Light.
HawkEye™ 1500 Series User Manual
Using ReadRunner
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