User Manual

Working with Tags
Chapter 3: Using the Reader Assistant 29
Reading Tag Data
The following procedure explains how to read tag data.
To read tag data:
1. Type an address location in the Address field.
2. Choose a selection from the Mem Bank menu.
3. Click Read Data and the information is shown in the Read Tag IDs field.
Writing Tag Data
First determine whether the first tag to respond will be written to or whether the first tag
matching the Select criteria is to be written to, based on the Select Criteria Mem Bank
selection. Note that if the Write changes the data in the fields used for Select Criteria, the
subsequent Verify will fail, even though the tag will have been successfully written.
No Select(00): Used when the “Write Data” action is to be applied to the first tag to
respond.
EPC(01): Used to write to a tag selectively based on the full or partial (starting at lowest
memory location) EPC of the tag. EPC to be compared must be entered as a multiple of
words (4 hex digits). This Select operation mode provides a subset of the functionality
provided by mode “EPC Mem”, but is easier to use.
1. Enter the EPC or partial EPC (multiples of 4 hex digits, each representing a word)
2. Enter the length, in bits, of the portion of the EPC to be compared, as an integer. Only
the portion of the EPC specified by the length will be compared. (“0” will always
match). The length cannot exceed the entered EPC length.
TID (02): Used to write to a tag selectively based on the any portion of the TID memory
contents of the tag.
1. Enter the data to be compared in bytes
2. Enter the starting address bit offset from the start of memory in hex (4 bytes
maximum)
3. Enter the length, in bits, of the portion of the data to be compared, as an integer. Only
the portion of the data specified by the length will be compared. (“0” will always
match). The length cannot exceed the entered data length.
User (03): Used to write to a tag selectively based on the any portion of the User
memory contents of the tag.