Chapter 6 Scanning Control; Software Control; Automatic Detection Of Labels - Denso QK30-U User Manual

Chapter 6 Scanning Control

6.1

Software Control

You can control the scanner by sending scanning control commands from the host computer via USB-COM interface.
(For details about control commands, refer to Appendix 2.)
Commands
R
Z
Each of these commands should be enclosed with a header and terminator for transmission according to the
communications conditions of the scanner.
6.2

Automatic detection of labels

Bringing a code label within the scan range of the scanning window turns on the illumination LEDs and starts the
scanner reading the code.
The illumination LEDs come on when you bring a code label within the designated range or move a code label within
the same range. These LEDs go off when a code label is moved away from the range or stays within the range without
move for approx. 3 seconds.
The scanner offers a choice of three code response levels. Switch to a higher code response level if the illumination
LEDs will not come on when a code is brought into the range, for example. The code response level can be specified
with the configuration software (ScannerSetting_2D).
Note: Even if you do not bring a code label within the scan range, the illumination LEDs may come on when the
ambient level of light changes or any shadows move within the scan range.
Note: To enable the scanner to work properly in auto sensing mode, an ambient illuminance of at least 30 lx is
required.
Ready-to-scan command
Upon receipt of one of these commands, the scanner lights the illumination LEDs and
becomes ready to scan.
Standby command
Upon receipt of one of these commands, the scanner turns off the illumination LEDs and
switches to standby.
Description
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