Chapter 9 Communication; Rs-232C Interface - Denso GT10Q-SR User Manual

2d code handy scanner

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Chapter 9 Communication

The scanner uses asynchronous data transmission and communicates with the host PC or external equipment via the

RS-232C. You may set various communications conditions using the QR-coded parameter menu or configuration

software. Code data read is transferred in the following format.

(1) 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 configuration software provides 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

If the CTS signal is at high level (Enable transmission), the scanner transmits code data read. After that, the scanner waits

for and then processes a response. If the response is an ACK, the scanner normally ends the transmission; if it is a NAK,

the scanner transmits the code data again.

NOTE: The configuration software provides a choice of CTS timeout and ACK/NAK response time settings each from

100 ms to 9.9 s in 100-ms increments.

(2) Transmission speed

There are six transmission speeds available, ranging from 4800 bps to 115200 bps (default: 38400 bps).

(3) Characters

Characters that the scanner transfers are all ASCII codes. The frame format has the following parameters.

Data bits:

7 bits or 8 bits (default)

Parity:

Odd, Even, or None (default)

Stop bits:

1 bit (default) or 2 bits

NOTE: When data contains binary data or 2-byte codes, selecting "7 bits" for the data bits transfers the 2-byte codes with

the most significant bits trimmed.

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