Usb-Com Interface - Denso QB30-SR User Manual

This scanner is compliant with USB 1.1 (Universal Serial Bus Specification Revision 1.1).

12.2 USB-COM Interface

Installing the dedicated Active USB-COM port driver to the host computer allows the USB-COM interface to operate in
communications applications using the conventional serial port.
Note: Keyboard interface software (QR_kbif) is required to input scanned data transmitted from the scanner via USB-COM
interface into the application (Access, Excel, Internet Explorer and so on) directly. QR_kbif enables to pass the scanned data
to the application as if the converted data is input from the keyboard. The scanned data can be used at any applications with
key inputs. QR_kbif can be downloaded for free from our web site at QBdirect (member only, free).
http://www.qbdirect.net
 Notes for use
• If you connect the scanner to your computer first time or have changed the COM port for the scanner or hub, then confirm
the COM port number on the Windows Device Manager or the like before use.
• If you want to use two or more communications processors (software) or scanners concurrently on your computer, be sure to
assign a unique COM port number to each of them.
• It is not necessary to make settings such as transmission speed, data bits, parity, and stop bits (which are required for
communications software using a conventional serial port) since the USB interface ignores those settings. The flow control
should be set to "Hardware (RTS/CTS)" or "None."
• The virtual COM port on the computer and the scanner are connected with each other as shown below.
Computer
TxD
RxD
RTS
CTS
DTR
DSR
DCD
 Communications protocol
You can select either non-acknowledge mode or ACK/NAK mode.
Non-acknowledge mode (default)
If the CTS signal is at a high level (Enable transmission), the scanner transmits code data read.
Note: The command and configuration software (QB Setting) provide a choice of CTS timeout settings from 100 ms to 9.9 s
in 100-ms increments and two CTS signal control choices Yes and No.
ACK/NAK mode
Scanner
RxD
TxD
CTS
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