![Denso GT20Q-SB User Manual Download Page 131](http://html1.mh-extra.com/html/denso/gt20q-sb/gt20q-sb_user-manual_2483241131.webp)
118
Appendix 2: Control Commands
The commands which are transmitted between the host unit and the scanner through the communication line are called the
control commands.
Items set by control commands from the host unit overlap those indicated in “Parameter setting by QR Code parameter menu”.
Designation by the control command prevails over that by the QR Code parameter menu (refer to Chapter 13). However,
unless a PW command is given, the value set with the control command (excluding U commands) will not be stored in the
internal FLASH ROM, and therefore if the power is turned OFF, all designations made with control commands will be
cleared, and only the parameters set with the QR Code parameter menu will be valid.
The control commands are categorized into two types:
(1) Commands only consist of the command field.
(2) Commands consist of the command field and the option fields.
If a command other than one of the above is transmitted to the scanner, the outcome is not guaranteed.
Note 1: Control commands cannot be utilized when HID (Human Interface Device Profile) is selected.
Note 2: A command will not be initiated until the preceding command is completed.
(1) Command only consist of the command field
Command
Direction
Contents
Scanner
Host
Z
(Note 1)
Scanning standby
Only when the trigger switch is set to continuous reading mode 1 or
mode 2, the scanner will enter the scanning standby mode by
receiving “Z”, “READOFF” or “LOFF” command.
READOFF
LOFF
R
(Note 1)
Scanning start
Only when the trigger switch is set to continuous reading mode 1 or
mode 2, the scanner enters the scanning ready mode by receiving
“R”, “READON” or “LON” command.
READON
LON
B1
B2
B3
(Note 2) (Note 3)
Beeper
It beeps in the specified time within 100 ms after the command is
received.
Beeper can be operated even if it is disabled or if the scanner is in the
standby mode.
B1: Beeps for approx. 80 ms, 60 ms, 120 ms, or 140 ms.
B2: Beeps for approx. 120 ms.
B3: Beeps for approx. 240 ms.
BH1, BM1, BL1
BH2, BM2, BL2
BH3, BM3, BL3
(Note 2) (Note 3)
Buzzer sound (tone specification)
By adding a tone option to the above command, the buzzer can be sounded
in various tones.
•
Tone options
“
H”: Beeps in a high-pitch tone (3.5 kHz).
“
M”: Beeps in a medium-pitch tone (3.0 kHz).
“
L”: Beeps in a low-pitch tone (2.5 kHz).