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Appendix 2 Control Commands
Control commands refer to commands that are exchanged between the host computer and the scanner via the
communications line.
Some of the control commands that the host computer issues are functionally equivalent to some parameters that
can be set with the Bar coded parameter menu (refer to Chapter 11). Control command settings have priority over
settings made with the Bar coded parameter menu.
Note that turning off the scanner will clear control command settings so that settings made with the Bar coded
parameter menu will take effect unless the PW command is sent to the scanner for saving control command
settings into the FLASH ROM.
If commands other than ones listed below are sent to the scanner, the scanner operation is not assured.
Note: Selecting the USB keyboard interface disables the control commands.
Note: Until the completion of execution of a specified control command, the subsequent command will not be
executed.
Note: After recognition of the virtual COM port when the USB-COM interface is used, the scanner requires a
maximum of one second to be ready to receive control commands.
Transfer Direction
Control
Commands
Scanner Host
Function
Z (Note1)
READOFF
LOFF
Reading standby
Only when the trigger switch is set to continuous reading
mode 1 or 2, the scanner will enter the reading standby state
by receiving “Z”, “READOFF” or “LOFF” command.
R (Note1)
READON
LON
Reading start
Only when the trigger switch is set to continuous reading
mode 1 or 2, the scanner will enter the reading ready mode
by receiving “R”, “READON” or “LON” command.
B1
B2
B3
(Note3) (Note4)
Beeper sound
Beeper sounds for a specified duration within 100ms after the
command is received.
“B1” : Beeps for approx. 80ms, 60ms, 120ms, or 140ms.
“B2” : Beeps for approx. 120ms
“B3” : Beeps for approx. 240ms
Beeper can be operated even if it is disabled or if the scanner
is in the standby state.
BH1, BM1, BL1
BH2, BM2, BL2
BH3, BM3, BL3
(Note3) (Note4)
Beeper sound(tone specification)
By adding a tone option to the above command, the beeper
can be sounded in various tones.
“H”: Beeps in a high-pitch tone. (4.0 kHz)
“M”: Beeps in a medium-pitch tone. (3.0 kHz)
“L”: Beeps in a low-pitch tone. (2.8 kHz)
LB (Note3)
Light the blue indicator LED
Within 100 ms from the receipt of the LB command, the blue
indicator LED lights for approx. 500 ms.
LG (Note3)
Light the green indicator LED
Within 100 ms from the receipt of the LG command, the
green indicator LED lights for approx. 500 ms.
LR (Note3)
Light the red indicator LED
Within 100 ms from the receipt of the LR command, the red
indicator LED lights for approx. 500 ms.
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