17
6.2 Software
Control
You can control the scanner by sending scanning control commands from the host computer via the RS-232C or
USB-COM interface, instead of pressing the trigger switch.
Scanning control commands include R, READON, LON, Z, READOFF and LOFF and are restricted by the trigger
switch operating modes, as listed below.
(
√
: Command valid)
Trigger switch operating modes
Commands Description
Auto-off
mode
Momentary
switching
mode
Alternate
switching
mode
Continuous
reading
mode 1
Continuous
reading
mode 2
R,
READON,
LON
Ready-to-scan commands
Upon receipt of one of these commands,
the scanner lights the illumination LEDs
and becomes ready to scan.
-- -- --
√
√
Z,
READOFF,
LOFF
Standby commands
Upon receipt of one of these commands,
the scanner turns off the illumination
LEDs and switches to standby.
-- -- --
√
√
Each of these commands should be enclosed with a header and terminator for transmission according to the
communications conditions of the scanner.
6.3 Auto Sensing Mode--Automatic detection of labels
In auto sensing mode (that is selected with the QR-coded parameter menu or the configuration software
(ScannerSetting_2D)), bringing a code label within the scan range of the reading window turns on the illumination
LEDs and starts the scanner reading the code. No trigger switch operation is required. Use this mode when the scanner
is stationary to a stand and a code label is moved.
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 sensitivity levels for responding to codes. Switch to a higher sensitivity level if
the illumination LEDs will not come on when a code is brought into the range, for example.
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 500 lx is required.