Denso AT21B-SM Bedienungsanleitung PDF herunterladen (Seite 23)

6.2 Software Control

You can control the scanner by sending reading control commands from the host computer via the RS-232C or

USB-COM interface, instead of pressing the trigger switch.

Reading 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

Momentary

switching

mode

(Reverse

type)

Alternate

switching

mode

Continuous

reading

mode

1 or 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.

× × × ×



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 Reading by Automatic detection of labels

In auto sensing mode (Auto sense operation in auto stand mode is included), bringing a barcode label within the

scan range of the reading window turns on the illumination LEDs and starts the scanner reading the barcode. No

trigger switch operation is required. Use this mode when the scanner is stationary to a stand and a barcode label

is moved.

The illumination LEDs come on when you bring a barcode label within the designated range or move a barcode

label within the same range. These LEDs go off when a barcode label is moved away from the range or stays

within the range without move for approx. 5 seconds.

The scanner is set to the Auto sense operation when the power is turned on.

If the trigger switch is pressed while the scanner is operating in this mode, the scanner goes to the Auto off and

reads a barcode whenever the trigger switch is pressed.

However, the scanner will automatically return to the Auto sense operation if the trigger switch is not pressed for

longer than a time specified for the scanner to return to the Auto sense.

The time for the scanner to return to the Auto sense operation from the Auto off operation can be selected with

the configuration software.

Auto sensing mode and Auto stand mode are selected with the bar coded parameter menu or the configuration

software (Scanner Setting).

The scanner offers a choice of three sensitivity levels for responding to barcodes. Switch to a higher sensitivity

level if the illumination LEDs will not come on when a barcode is brought into the range, for example.

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