User's Manual

V750 RFID READER/WRITER, ANTENNA 2006-06, REV.C

OPERATION MANUAL

48 of 110

©OMRON CORPORATION 2006

3. Command Line Interface

About this Guide

This chapter lays the groundwork for the communication protocol between client software running on a remote

computer and the V750 reader.

3.1 Command Interface

3.1.1 Command / Response Frame Structure

Ethernet and RS-232C has almost same command structure for command line I/F. Command frame has a

Command Code area to control the R/W and Command Data area that is used with Command Code.

Terminator that indicates the end of the frame is [LF].

RS-232C requires a start code [SOH], check data, and [CR]. The start code shall be at the beginning of the

frame, and the check data and the [CR] shall be immediately before terminator ([LF]).

Command frame for Ethernet

Command frame for RS-232C

Contents in command frame

Contents Description Ethernet

required?

RS-232C

required?

Start code [SOH,0x01] Indicates the beginning of the frame with SOH,0x01. No Yes

Command code Specifies the command the Reader executes. Yes Yes

Command data Specifies the data for use with Command Code Yes Yes

FCD Stands for Frame Check Data (hereinafter referred to as

“FCD”. The code is to detect a data error.)

The result of the horizontal parity calculation from after

SOH through immediately before FCD is expressed by

two characters of ASCII code.

No Yes

Command Code Command Data LF

4 B

tes n 1

SOH Command Code Command Data FCD CR LF

1 4 n 2 1 1

Terminato

FCC Calculation Area