Siemens SIMATIC RF600 Series Configuration Manual page 68

Configuring with the WBM
7.3 The menu items of the WBM
Transponder memory configuration
The "Transponder memory configuration" area contains a graphic to illustrate the memory
configuration and the memory areas. For a detailed description of the memory structure,
refer to the section "The "Settings - Tag fields" menu item (Page 63)".
Explanation of how filters work
By using filters and depending on the filter criteria, you can separate out specific
transponders that will not be processed any further. For example in environments with
different product types, you can use filters to filter out the product types that are unimportant
for the application or only identify the relevant product types. This is only possible if the
information in the memory area of the transponder has been processed accordingly.
Example scenario
A forklift truck takes a pallet with goods from the conveyor belt to store it in the warehouse
and in doing so drives through an RFID gate. Both the pallet and the products on the pallet
are fitted with transponders. During the remainder of the process, only the information about
the palette is necessary. Assign a filter-relevant ID to the transponder of the pallet. Write, for
example, to the 10th position in the EPC-ID of all pallet transponders the value "3". The
EPC-IDs of the goods transponders, on the other hand, must not have "3" at the 10th
position.
With a suitable filter, (value "3" at the 10th position of the EPC-ID), you can now filter out all
goods transponders and only identify and process the pallet transponders.
If a filter is active, the appropriate data is read out from each identified transponder and
checked against the filter criteria. Depending on this check, transponders are discarded or
processed further. A distinction can be made between inclusive and exclusive filtering.
Example of a filter - "Pallet"
The following filter example shows how to create the suitable filter for the sample scenario
described.
1. Click on the "Insert" button and select the newly created filter.
2. Name: Enter a name in the input box.
3. Bank: Select the memory area "1 - GEN2 - EPC" from the drop-down list.
4. Start address: Enter "8" in the input box as the start address.
The EPC-ID starts at the 4th byte of the memory area "EPC". Each byte writes two
positions of the EPC-ID. To address the 10th position of the EPC-ID, you therefore need
to select the 8th byte:
5. Length: Enter "1" in the input box as the number of bytes.
Each byte contains two positions of the EPC-ID. Since only one position is relevant in this
example, you need to mask out the second position using the mask.
6. Criterion: Enter "03" in the input box as the criterion.
Since only the second position is relevant in this example, the first position of the criterion
can have any other value.
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Configuration Manual, 11/2018, C79000-G8976-C386-07
SIMATIC RF600