Denso AT21B-SM Manual do Utilizador descarregar pdf (Página 51)

9.4 Communication Format

Select one of the following two data transmission formats.

No. of digit

Header

Scanner

Code ID

mark

Prefix

n1 n2 n3 N4

Code data Suffix Terminator BCC

No. of digit

Header

Scanner

Prefix

Code ID

mark

n1 n2 n3 n4

Code data Suffix Terminator BCC

(1) Header / Terminator

The following choices are available.

RS-232C interface, USB-COM interface

Header: None (default), STX, or user-defined one

Terminator: CR (default), none, LF, CR/LF, ETX, or user-defined one

USB keyboard interface

Header: None (default), TAB, ESC, ENTER or others

Terminator: None, TAB, ESC, ENTER (default) or others

For details, refer to Chapter 10.

(2) Scanner ID

A scanner ID is a unique serial number assigned to an individual scanner at the time of shipment. It consists of six

numerals.

(3) Prefix/Suffix

A prefix or suffix consists of up to eight ASCII characters (00h to FFh). You can set a prefix or suffix with the

configuration software (Scanner Setting). (Default: No prefix or suffix)

(4) BCC

The Block Character Check (BCC) exclusive-OR all bits at the same bit level in characters following the header

and preceding the terminator in a transmission block to generate a horizontal parity byte to be transferred in a

binary code. The BCC can be enabled or disabled. If no header is prefixed or the USB keyboard interface is

selected, no BCC will be transferred.

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Denso AT21B-SM Manual do Utilizador Página 51