Symbol Technologies LS 1000 - Manual (Page 71)

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LS 1000 Product Reference Guide: Chapter 4, Programming the LS 1004
Hardware and Software Handshaking Sequence
NO REPONSE.
AFTER 2 SECONDS, THE UNIT
BEEPS 4 TIMES TO INDICATE
A TRANSMISSION ERROR.
NO YES
HARDWARE HANDSHAKING
SOFTWARE HANDSHAKING
NO REPONSE.
AFTER 2 SECONDS, THE UNIT
BEEPS 4 TIMES TO INDICATE
A TRANSMISSION ERROR.
UNIT ASSERTS REQUEST-TO-SEND LINE.
HOST RESPONDS BY ASSERTING CLEAR-TO-SEND LINE.
NO
YES
ACK/NAK SWITCH ON?
NO
YES
YES
YES ,
NO
NO
4 LONG BEEPS
FINISHED
DATA IS TRANSMITTED .
WAIT FOR ENQ CHARACTER
TO BE RECEIVED FROM HOST
ENQ SWITCH ON?
WAIT FOR ACK OR NAK RESPONSE FROM HOST
NO REPONSE.
AFTER 2 SECONDS, THE UNIT
BEEPS 4 TIMES TO INDICATE
A TRANSMISSION ERROR.
ACK RESPONSE?
TRY 3 TIMES?
SYMBOL IS DECODED
RTS AND CTS
HANDSHAKING LINES USED
coverBook Page 37 Monday, December 1, 1997 2:19 PM