Installation Manual Part 2
Installation manual Reader 69
Modications, misprints and errors excepted
English
6.7.4. Read/write data
6. Operating the reader
6.7.5. Lock
This header supplies detailed access to all the data areas of the tag. Access is obtained by entering the selected
memory bank, the address within the memory bank and the number of words, expressed as 16-bit words.
If data are to be written, they must be entered in the Data to write eld. The data mask allows only
individual bits on the tag to be changed. To do this, the mask must be entered in the Data mask eld. The
reader uses this mask to change the data read from the tag at the points where 1 bits are written in the
mask, and writes the result back into the tag. The desired data can optionally be written to a single tag
in the eld or to all tags in the eld. If they are written to all tags in the eld, these tags must all have the same
conguration (lock and password).
The header also offers the facility to read data from the selected tag or from all tags in the eld. If the tags in the
eld have differing passwords and are congured differently, the data must be read by individual tags.
The next section deals in more detail with the saving of the individual memory areas.
The EPC Gen 2 standard provides security mechanisms for the tag data areas. This allows individual memory areas
and functionalities of the tags to be provided with a password to protect it against access and/or changes.
Under the Lock header, the mask that species access to the areas in accordance with the EPC Gen 2 standard can be
customised to suit the application. If no changes are required for an area, No change must be selected in the respective
drop-down menu. The areas are grouped as follows:
1 Deactivate – species whether or not a deactivation password is necessary for deactivating the tag. Further
details can be found in ((E)).
2 Access – species whether an access password is necessary for accessing a tag. If no access password is set,
the TAG can be addressed in the open state condition. Further details can be found in ((E)).
3 EPC – allows specication of whether or not the access password is necessary for changing the EPC.
4 TID – this area contains general information about the tag. This area can also be protected against user access
by setting the access password.
5 USER – if the tag has a memory area provided for user data, these can be protected by setting the access
password.
The respective items in the drop-down menu are divided into access blocks, which prevent reading and writing, and
write blocks.
Note
If the option with the sufx is permanently selected, this option can no longer be changed. Further details can be
found in ((A)) „communication protocol“.
Clicking on the Lock selected tag button loads the mask that was created to the list of the selected
tag. Alternatively all the tags in the eld can be blocked, on the precondition that the tags all have the
same password.
Note
Wrongly conguring the Lock header can render the tag unusable.