26 DataMan 500 Quick Reference Guide
DataMan 500 Quick Reference Guide 27
DataMan 500 Triggering
External Triggers
modes (the modes are supported for 2D codes as well). If you are
using external triggering you can use any of these methods to trigger
DataMan 500:
• Press the trigger button on
the reader.
• Send a pulse on the I/O
cable:
• T (red/blue)
• Trigger - (white)
• Send a trigger command over
the RS-232 connection or
Ethernet connection.
• Press <CTRL>-T on the
keyboard.
• Click the Trigger button in the
Setup Tool:
DataMan 500 supports
self-triggered
operation. In self-trigger mode, at an
interval you configure, the reader automatically detects and decodes codes in
its field of view. The high-speed image acquisition and processing capabilities
of the DataMan 500 allow it to detect
and decode
codes at up to 80 codes per
second, multiple decodes per scan. If you set a higher re-read delay than the
trigger interval, there is a code output only once until the code is out of the
field of view for the duration of the re-read delay.
DataMan 500 also supports these additional trigger modes:
• Single (external trigger): Acquires a single image and attempts to decode
any symbol it contains, or more than one symbol in cases where multicode
is enabled. The reader relies on an external trigger source.
• Presentation: Scans, decodes and reports a single code in the field of view.
The reader relies on an internal timing mechanism to acquire images.
• Manual: Begins acquiring images when you press the trigger button on
the reader, and continues acquiring images until a symbol is found and
decoded or you release the button.
• Burst: Performs multiple image acquisitions based on an external trigger
and decodes any symbol appearing in a single image or within a sequence
of images, or multiple symbols in a single image or within a sequence of
images when multicode is enabled. You can control the number of images
within each burst and the interval between image acquisitions.
• Continuous: Begins acquiring images based on a single external trigger
and continues to acquire and decode images until a symbol is found and
decoded, or until multiple images containing as many codes as specified
in multicode mode are located, or until the trigger is released. You can
configure your reader to acquire images based on the start and stop signal
from separate digital IO pulses.
Applications for 1D codes typically use Self, Single, Burst, or Continuous
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