Balluff BIS U-4A7-082-01C-07-S4 Betriebsanleitung Seite 126

BIS U-4A7-082- _1C-07-S4
Industrial RFID system - Read/write head
8
System integration (continued)
Explanation of the input buffer with 32 bytes of
process data (standard)
Subaddress Bit name
1st bit string
0x00
BB
HF
TO
MT
AF
AE
AA
CP
0x01
0x02
0x03... 0x1E
0x1F 2nd bit string
BB, HF, TO, MT, AF, AE, AA, CP
The 1st and 2nd bit string must be compared
by the user or the controlling system to query
the validity of the transmitted data. The data is
valid if the 1st and 2nd bit string have the same
value.
Description of bit Code Present (CP) and Multiple
Tag (MT)
CP MT Meaning
0 0 No tag in the field
1 0 Exactly one tag in the field. Automatic
reading is OK (if parameterized).
0 1 More than one data carrier is in the field.
These cannot be processed.
1 1 Does not occur.
42 english
Meaning Functional description
Operational 1 = Device is ready for operation
0 = Device is in default state
Head failure 1 = Head is switched off
0 = Head is switched on
Toggle bit A change of state during an assignment indicates that the read/write
head is ready to transmit further data
Multiple tag There is more than one data carrier in the field of the read/write head.
Assignment error 1 = Assignment processed with errors
0 = Assignment processed without errors
Assignment end 1 = The assignment was completed without errors
0 = No assignment or assignment in progress
Assignment 1 = The assignment has been recognized and accepted. Processing in
accepted progress.
0 = No assignment active
Code tag present Data carrier is in the read range of the read/write head
No data carrier in the read range
Error code Error number is entered if assignment was processed incorrectly or was
canceled. Only valid with AF bit! See section 8.8 on page 62.
or data Data read from the data carrier
Data Data read from the data carrier
Data Data read from the data carrier
If the 1st and 2nd bit strings match, valid data is present.