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Application Tag Commands

Command Set 89

Read Tag Multiple (22h)

For deprecated version of this command see Appendix D: Read Tag ID Multiple (22h)

The Read Tag Multiple command supports several different levels of functionality. In

addition to performing a Basic Search Operation for all tags in the field it can also perform

advanced searching and perform operations on the tags found. The different syntax for

Read Tag Multiple are defined as follows:

 Basic Tag Inventory - Searches for and returns all tags in the field.

 Tag Inventory with Select - Searches for and returns all tags in the field meeting Select

criteria as defined by Tag Singulation Fields

specified.

 Tag Inventory With Embedded Operations - Allows for operations (Write Tag Data, Lock

Tag, Kill Tag, Read Tag Data) to be performed on each tag inventoried.

Note

A Read Tag Multiple command will return early if it fills up the Tag Buffer

before the timeout has expired. This will not result in an error. If a Read Tag

Buffer command is issued with an already full Tag Buffer an error will be

returned.

Basic Tag Inventory

The Read Tag Multiple command performs a search for the specified period of time then

returns the number of tags that have been found. Afterwards, multiple Get Tag Buffer

commands can be sent to receive the found tag EPCs along with tag read metadata,

including the antenna the tag was read on. The command allows the user to specify the

method to use when multiple antennas are configured and connected along with

indicating the command contains embedded commands:

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Thingmagic M5e-Compact Bedienungsanleitung Seite 89