User's Manual

CHAPTER 6 READER-HOST PROTOCOL
NANOSCANNER READER USER GUIDE • DOC # 8101029-000 REV A 70
© 2003 Alien Technology™
S
ET ACQUIREMODE
GET ACQUIREMODE
Whenever the reader is called upon to read a tag it does so using the current
AcquireMode. Currently the allowable modes are as follows:
AcquireMode Description
Inventory Perform full inventory of multiple tags.
Global Scroll Perform fast search for single tag.
The default setting is Inventory. For a detailed description of the different modes,
please refer to the earlier chapter entitled ‘Tag Reading Fundamentals’
• Inventory
The Inventory acquire mode performs a full anti-collision search on tags in
the reader’s field of view. This method will locate and distinguish multiple
tags in front of the reader at the same time.
• Global Scroll
The Global Scroll acquire mode instructs the reader to read a single tag
repeatedly. This is a very fast tag reading method which is most effective
when only one tag at a time is expected to be within reader range, as in
conveyor belt applications. Under such circumstances, the performance for
single tag reading is considerably faster than repeatedly doing a full tag
search using the Inventory mode.
NOTE: If multiple tags are in range of the reader when this mode is used, the
reader will either select one of the tags (usually the “strongest’” or “loudest”)
to read and report it, or will read none of the tags.
Example
Command
Response
Set AcquireMode = Global Scroll
>AcquireMode = Global Scroll
Command
Response
Set AcquireMode = Inventory
>AcquireMode = Inventory
NOTE: Changes made with this command will take effect immediately.
S
ET ACQUIRESLEEP
G
ET ACQUIRESLEEP
AcquireSleep is an On or Off parameter.