READER FUNDAMENTALS CHAPTER 2
READER INTERFACE GUIDE
DOC. CONTROL # 8101938-000 REV 05
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One of the major benefits to this mode of operation is that many readers can be
configured to send tag messages to a single host. Thus, a single application can
listen for and process data from multiple readers over the network.
A N
OTE ABOUT AUTOMODE ON THE ALR-9770
The ALR-9770 reader implements a simplified version of the AutoMode found on
other Alien readers. Digital I/O hasn't been implemented, so the use of start and
stop triggers (discussed on the following pages) doesn't apply. Also, the ALR-
9770 lacks the Notify engine, so there is no asynchronous notification
mechanism.
Defining the Autonomous Read Operation
Autonomous Mode functionality is summarized in the state diagram shown
below. Fundamentally, a reader operating in Autonomous Mode moves between
several states: Waiting, Working, Evaluation, and Notification. Waiting, Working,
and Evaluation states have associated with them an optional digital output state
that is set upon entering the state. Movement from one state to the next is
initiated by an expiration of a timer, a triggered event on the digital input lines, or
changes to the TagList.
Each element of the State Diagram is described below. Associated with each
element are one or more commands that are used to configure the reader.
Autonomous Mode State Diagram
Wait
(AutoWaitOutput)
AutoStartTrigger?
AutoAction
(AutoWorkOutput)
AutoStopTimer Expired
or AutoStopTrigger?
Evaluation
(New Tag? Programmed?)
True Evaluation
(AutoTrueOutput)
False Evaluation
(AutoFalseOutput)
AutoTruePause
Expired?
AutoFalsePause
Expired?
Notification
Needed?
Issue
Notification
no
no
no
no
AutoStartPause Expired?
(ALR-9800)
no
no
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