Users Manual - Warranty Life

5.2 Software Control
You can control the scanner by sending scanning control commands from the host computer via the RS-232C interface,
instead of pressing the trigger switch.
Scanning control commands include R, READON, LON, RC, Z, READOFF and LOFF and they are restricted by the
trigger switch operating mode, as listed below. In momentary switching mode 1, for example, the RC command is
invalid. In auto-off mode 2 and momentary switching mode 2, all of these commands are invalid.
(√ : Command valid)
Commands Description
R,
READON,
LON
RC
Z,
READOFF,
LOFF
Ready-to-scan commands
Upon receipt of one of these commands,
the scanner turns on the illumination
LED and becomes ready to scan.
Standby commands
Upon receipt of one of these commands,
the scanner turns off the illumination
LED and goes on standby.
Auto-off
mode 1
9
Trigger switch operating modes
Auto-off
mode 2
Momentary
switching
mode 1
Momentary
switching
mode 2
Continuous
reading mode
√ -- √ -- √
-- -- -- -- √
-- -- √ -- √
Each of these commands should be enclosed with a header and terminator for transmission according to the
communications conditions of the scanner.
Note: When the scanner is ready to scan with an R, READON or LON command, pressing the trigger switch
cancels the command control, producing the operation specified for the trigger switch.
Notification of a scanning failure
If the scanner fails to read a bar code and switches to standby in auto-off mode 1 or momentary switching mode 1, it
can send the following two types of notification data (cancel or error) to the host computer.
- CAN (18h)
- ERROR (with header and terminator)
Control scheme
(1) Auto-off mode 1 or momentary switching mode 1
Successful read
Command input (RxD)
Bar code
Illumination LEDs
Data output (TxD)
Ready-to-scan command
Bar code data