Chapter 5. Features - Denso QS20P-A User Manual

Chapter 5. Features

Scanning
If you press the trigger switch, the QS20P-A will turn the illumination LED on and
become ready to scan. It will take approx. one second to make the QS20P-A
ready for scan after depression of the trigger switch. Bringing the scanning
window into contact with a target code will cause the QS20P-A to read the QR
code and send it to the connected PC or external equipment automatically.
After the QS20P-A sends data or after any trigger switch operation (which may
differ depending upon the trigger switch operation mode as described below),
the QS20P-A will turn the illumination LED off and go into the standby mode.
After the specified time, the QS20P-A will automatically turn itself off. You may
modify the automatic powering-off time by using the QR-coded parameter menu
given in Chapter 7.
Pressing the trigger switch in the standby mode will make the QS20P-A ready for
scanning approximately 0.1 second later.
Trigger switch control
The trigger switch is available in four operation modes—Auto-off mode, Mo-
mentary switching mode, Alternate switching mode, and Continuous reading
mode. You may switch between those modes from the QR-coded parameter
menu given in Chapter 6.
(1) Auto-off mode
Holding down the trigger switch lights the illumination LED for a maximum of 5
seconds during which the QS20P-A is ready to scan. If you release the trigger
switch or when the QS20P-A completes code reading, the QS20P-A turns the
illumination LED off and goes into the standby mode.
(2) Momentary switching mode
Only while you hold down the trigger switch, the illumination LED lights and the
QS20P-A is ready to scan. Releasing the trigger switch turns the illumination
LED off and places the QS20P-A in the standby mode.
(3) Alternate switching mode
Pressing the trigger switch turns the illumination LED on and makes the QS20P-
A ready to scan. Even if the trigger switch is released, the illumination LED
remains on until a code is read successfully or you press the trigger switch
again. Pressing the trigger switch changes between the "ready to scan" and "in
standby mode" (the illumination LED on and off).
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