Intermec IF2 Basic Reader Interface Programmer's Reference Manual (BRI version - Page 106
QUERYSEL, QUERYTARGET, RDTRIES, Using EPCC1G2 Select Logic in Data, Conditions
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Chapter 4 - BRI Commands QUERYSEL Specifies the contents of the "Sel" field for EPCC1G2 "Query" commands. Valid values are from 0 to 4. Default is 4. QUERYSEL Value Descriptions Value 0 1 2 3 4 Description All tags All tags Tags with SL not asserted Tags with SL asserted Reader determines Sel value You can use this attribute with the EPCC1G2 Select Logic to select a sub-population of tags. For more information, see "Using EPCC1G2 Select Logic in Data Conditions" on page 33. However, for normal operations that do not use the EPCC1G2 Select Logic, leave this attribute set to the default value of 4. QUERYTARGET Specifies the "Target" field for EPCC1G2 "Query" commands. Valid values are A and B. Default is A. QUERYTARGET Value Descriptions Value A B Description Tags are reset to the A state (if UNSELTRIES is not equal to zero) and EPCC1G2 queries target tags in the A state. Tags are reset to the B state (if UNSELTRIES is not equal to zero) and EPCC1G2 queries target tags in the B state. RDTRIES You can use this attribute with the EPCC1G2 Select Logic to select a sub-population of tags. For more information, see "Using EPCC1G2 Select Logic in Data Conditions" on page 33. However, for normal operations that do not use the EPCC1G2 Select Logic, leave this attribute set to the default value of A. Sets the number of times an attempt is made to read data from a tag before a response is returned to a READ command. Range is 1 to 254. Default is 3. This example tells the RFID reader to execute the read algorithm up to a maximum of five times on each [READ FIELD] specified in a READ command line: ATTRIBUTE RDTRIES=5 94 Basic Reader Interface Programmer Reference Manual