User's Guide

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⑨
Mask length sets the mask length (0–255)
⑩
Mask data sets the data to be ltered
⑪
Get
reads the data of the lter selected at ①
⑫
Set sets the select lter
Tip
In Generation 3 readers, select lter data are permanently stored in the reader, e.g. if the select lter has
been activated, it is active after a reader restart.
16.8.5 Applying a Select Filter (Example)
You have the following results of the basic reading but you would like only the tags with the FC28 in the memory
address to take part in the inventory:
Fig. 13: Basic reading: select lter required
To do so, it is necessary to create a select lter. The advantage of this process is that the ltering takes place already at
the air interface level.
Tocreatetheselectlterasshowninthegurebelow:
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8
9
2
4 5
1
2
3
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5
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1. Select the lter you would like to save the ltering settings to under Filter (①).
2. Select the target (②). Make sure the target matches the session set in ⑲Fig. 67
3. Select an action (③). In the example, the action is set to
100 ; see also EPCglobal Gen 2 Specication .
4. Select the
EPC memory bank (④).
5. Activate the select lter (⑤).
6. Refer to the
EPCglobal Gen 2 Specication to check from which bit pointer the lter will search for the value
according to which you would like to lter the tags ( FC28 in the example); see pp. 44–46 in the EPCglobal Gen 2
Specication V 2.0. 1. In the example, FC28 is the third word in the EPC memory bank (bit pointer 0x00 is the CRC,
bit pointer 0x10 is the PC, bit pointer 0x20 is the rst EPC word). Therefore, FC28 corresponds to the bit pointer
0x40.
7. Enter
40 at Bit pointer (⑥).
8. Enter the mask length at ⑦. In the example,
FC28 is one word, therefore, the value is 16 .
9. Enter the value (
FC28 ) at ⑧.
10. Click
Set (⑨).
11. Go to
Expert settings 1 .
12. In Selection Parameters, set the value at target to
B ; see also EPCglobal Gen 2 Specication .
13. Start the reading in the
Basic reading tab: