5. SYSTEM MODE
EO18-33027
5.11 RFID Module Setting
5-93
5.11.4.2 Q VALUE
This is effective only for the B-EX700-RFID-U2-EU/US-R, B-EX700-RFID-U4-R, B-EX700-RFID-U4-
EU/US-R, U4 module preinstall model (B-EX4T1/EX4T2-GS18/TS18-CN-R).
In the case multiple RFID tags are read at the same time, this menu is useful to pinpoint a target tag.
Set the Q value to “1” or greater (2 is recommended) with the [UP] or [DOWN] key. Q value “0”
causes the tags to interfere with each other and disables proper data write.
When the Q value is set, set an AGC threshold for data write and an AGC threshold lower limit for
retry, also. Setting all these values enables writing data to a tag placed just above the antenna.
However, the problem that multiple tags are read at the same time does not occur with most RFID tag
types. It is not necessary to change the default setting.
Max.
value
Min. value
Step
Display
Sign
Integer
digit
Decimal
place
0-padding
Unit of
measure
15
0
1
Decimal
None
2
0
None
None
5.11.4.3 AGC THRESHOLD
This is effective only for the B-EX700-RFID-U2-EU/US-R, B-EX700-RFID-U4-R, B-EX700-RFID-U4-
EU/US-R, U4 module preinstall model (B-EX4T1/EX4T2-GS18/TS18-CN-R)
When the obtained gain of an RFID tag is lower than the AGC threshold, the tag is considered as an
error tag even if a data write succeeds.
When the AGC threshold is set to “0”, all tags are writable.
When this parameter is set to “8”, for example, tags with the AGC threshold level of 7 or less are
considered as error tags.
The optimum value is different depending on the tag types.
Max.
value
Min. value
Step
Display
Sign
Integer
digit
Decimal
place
0-padding
Unit of
measure
15
0
1
Decimal
None
2
0
None
None
