Intermec IV7 Basic Reader Interface Programmer's Reference Manual (BRI version - Page 92
BRI Extensions for Impinj Monza 4 Tags, READ IMPINJQT
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Chapter 4 - BRI Commands BRI Extensions for Impinj Monza 4 Tags This section lists BRI extensions that are specific Impinj Monza 4 tags. The Impinj Monza 4 tags implement a 16-bit QT status field and a custom command to read and write the QT field. The most significant bit (QT_SR) controls the range of the response of a tag. When set, the tag reduces the strength of its backscattered signal to reduce the range which the tag can be read. The second significant bit (QT_MEM) controls whether the tag presents the public or private memory map to the reader. When set, the tag exposes its public memory map. For more information on the Impinj Monza 4 tags, see the product specification for Impinj Monza 4 tags. READ IMPINJQT Purpose: Syntax: Example: Use this command to read the QT status. The result is a 16-bit hexadecimal value representing the QT status bits from the tag. READ [flex_query_selector]IMPINJQT [TAGTYPE=] [WHERE ] [PASSWORD=] In this example, the first tag has both the QT_SR and the QT_MEM bits cleared (set for normal-range and private memory map). The second tag has both bits set (set for short-range and public memory map). READ IMPINJQT H300833B2DDD901400000000000000000 H0000 H300833B2DDD901400000000000000001 HC000 WRITE IMPINJQT Purpose: Syntax: Example: Use this command to write to the QT status field. WRITE [flex_query_selector]IMPINJQT=H {PERMANENT} [TAGTYPE=] [WHERE ] [PASSWORD=] = Contains a 16-bit value representing the contents of the QT status field to be written. The most significant bit is the QT_SR which controls the short-range/ normal-range setting of the tag. The next most significant bit is the QT_MEM bit which controls the public/private memory map setting of the tag. Example 1: WRITE IMPINJQT=H0000 H300833B2DDD901400000000000000000 WROK Temporarily set the tag for normal range and private memory map. Example 2: WRITE IMPINJQT=HC000 H300833B2DDD901400000000000000000 WROK Temporarily set the tag for short range and public memory map. 80 Basic Reader Interface Programmer Reference Manual