66
13.7 Read User data of the RFID tag automatically (asynchronous mode)
The control and status byte must have value “10” before the following command sequence can be
started .
13.7.1 Command sequence view
Step 0:
no tag in field
Step 1:
no tag in field
Step 2:
tag in field
Step 3:
no tag in field
Step 4:
tag in field
Remark
PLC process data output
Byte 1
0 0
0
0
0
0
0
1 AO
0
0
0
0
0
2 WR
0
0
0
0
0
3 RD
0
1
1
1
1
Set ER and RD
synchronously to 1
4 UR
1
1
1
1
1
Set UR to 1
5 ER
0
1
1
1
1
6 DR
0
0
0
0
0
7 0
0
0
0
0
0
Byte 2 (Data length)
0x00
0x10
0x10
0x10
0x10
Number of User
data bytes to read
Byte 3 (Address-H)
0x00
0x00
0x00
0x00
0x00
Address (H-Byte)
Byte 4 (Address-L)
0x00
0x02
0x02
0x02
0x02
Address (L-Byte)
Byte 5
0x00
0x00
0x00
0x00
0x00
…
…
…
…
…
…
Byte 19
0x00
0x00
0x00
0x00
0x00
Byte 20
0x00
0x00
0x00
0x00
0x00
Step 0:
no tag in field
Step 1:
no tag in field
Step 2:
tag in field
Step 3:
no tag in field
Step 4:
tag in field
Remark
PLC process data input
Byte 1
0 TP
0
0
1 (1)
0
1
1 AI
0
0
0
0
0
2 WR-RDY 0
0
0
0
0
3 RD-RDY 0
1
1
1
1
4 UD
1
1
1
1
1
5 EF
0
1
1
1
1
6 DR-RDY 0
0
0
0
0
7 Diag
0
0
0
0
0
Byte 2 (Data length)
0x00
0x00
0x10 (2)
0x00
0x10 (2)
Number of bytes
read
Byte 3 (User data)
0x00
0x00
0x11
0x00
0xAA
User data byte 1
Byte 4 (User data)
0x00
0x00
0x22
0x00
0xBB
User data byte 2
Byte 5 (User data)
0x00
0x00
0x33
0x00
0xCC
User data byte 3
…
…
…
…
…
…
…
Byte 19
0x00
0x00
0x00
0x00
0x00
Byte 20
0x00
0x00
0x00
0x00
0x00
(1) TP bit indicate that the RFID tag is detected by the Read/write head .
(2) User data length of the RFID tag .