Datalogic Scanning DLCC - page 32

DL CORDLESS CARD™

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Case 3 – DLCC as Client / Server

Client

Server

HOST 1

HOST 2

Figure 7 – DLCC as Client / Server

Both DLCCs are able to communicate bi-directionally. For analysis purposes only, we

assume the situation where Host 1 is Client and Host 2 is Server. It is clear that the

situation is analogous in the opposite direction:

• If DLCC 1 - Transmission Mode = 1 way

ACK/NACK from Remote Host = disabled

FIFO = enabled

Handshaking = any

The Client, (Host 1) sends a message to the Remote Host (Host 2), but no

control exists upon reception and even if ACK/NACK Protocol is implemented on

the Server side (Remote Host), no answer is returned from DLCC 2 to DLCC 1.

This is not a secure communication.

• If DLCC 1 - Transmission Mode = 1 way

ACK/NACK from Remote Host = enabled

FIFO = enabled

Handshaking = any

The Client, (Host 1) sends a message to the Remote Host (Host 2). DLCC 2

acknowledges good radio reception but no control is made on Remote Host

reception. If DLCC 2 acknowledges radio reception within the Radio Protocol

Timeout, DLCC 1 sends ACK to its local Host, otherwise it sends NACK.

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Contents

Main Page CONTENTS Page REFERENCES CONVENTIONS REFERENCE DOCUMENTATION SERVICES AND SUPPORT COMPLIANCE N2468 WEEE COMPLIANCE Page QUICK START Page Page CONFIGURATION METHODS Page Page 1 INTRODUCTION 1.1 OVERVIEW 1.2 LED INDICATOR 2 INITIAL SETUP 2.1 CONFIGURATION STRINGS 2.2 DLCC SETUP RESTORE DEFAULT 1. SET RADIO ADDRESSES 2. 3. 4. 5. 3 CONFIGURATION COM PORT PARAMETERS AUD ATE ITS TOP ITS ANDSHAKING ACKING RAME F IMEOUT RX T ELAY HARACTER ROTOCOL ACK/NACK P DATA FORMAT EADER ERMINATOR EADER ELIMITER DDRESS A TAMPING DDRESS A ENGTH RADIO PARAMETERS RF B (Client only) TORE INGLE ACK/NACK F (Client only) EACON OST EMOTE 4 PARAMETER ISSUES AND DEFINITIONS 4.1 RADIO AND SERIAL COMMUNICATION CONTROLS Page Page Page 4.2 COM PORT PARAMETERS 4.2.1 Handshaking Page 4.2.2 ACK/NACK Protocol 4.2.3 RX Timeout 4.2.4 FIFO 4.2.5 Frame Packing Frame+ [CR] (default): the frame sent to DLCC is terminated by [CR]. This 4.3 DATA FORMAT 4.3.1 Header/Terminator Selection 4.3.2 Address Stamping 4.3.3 Address Delimiter 4.4 RADIO PARAMETERS 4.4.1 RF Baud Rate 4.4.2 Transmission Mode (Client only) 4.4.3 Radio Protocol Timeout (Client only) 4.4.5 ACK/NACK From Remote Host (Client only) 4.4.6 Beacon (Client only) 5 DEFAULT CONFIGURATION 6 TECHNICAL FEATURES A TYPICAL SYSTEM LAYOUTS A.1 DLCC SERVER A.2 BI-DIRECTIONAL COMMUNICATION B B HEX AND NUMERIC TABLE GLOSSARY INDEX Datalogic Mobile S.r.l. Via S. Vitalino 13 40012 - Lippo di Calderara Bologna - Italy 2001 EN 60950-1, D 2004