SECTIO
N
6
ID
Se
ns
or Unit
O
p
era
tion
SECTION 6
Controlling the ID Sensor Unit
119
RFID System
User's Manual
Commands Used to Read Data (Cyclic Data Transfer for Read,
Read with Error Correction, and UID Read)
1) Use the user program to set the processing address, number of processing bytes, data storage word
address, and other parameters for reading RF Tag data in the Special I/O Unit Area.
2) Use the user program to turn ON the Command Execution Bit (CIO n, bit 00) in the Special I/O Unit
Area.
3) When the ID Sensor Unit detects that the Command Execution Bit has turned ON, it turns ON the ID
Busy Flag (CIO n+7, bit 00).
4) The ID Sensor Unit reads the data from the RF Tag, places the Results Information (CIO n+8) and
Processing Results Monitor information (word n+9) in the Special I/O Unit Area, places the data
read from the RF Tag in the data storage words, turns OFF the ID Busy Flag (CIO n+7, bit 00), and
turns ON the Normal End Flag (CIO n+7, bit 01) for one scan.
5) Use the Results Information (CIO n+8), the Processing Results Monitor information (CIO n+9), and
the read data stored in the data storage words in the user program only after the Normal End Flag
(CIO n+7, bit 01) turns ON. The Results Information (CIO n+8) will be held until the Error Reset Bit
(CIO n, bit 01) is turned ON or until the next communications command is received.
• Data is transferred to the data storage words at a rate of 160 bytes per scan.
(1)(2)
(4)
(3)(4)
(4)
(4)
Amplifier or Antenna
Special I/O
Unit Area
CIO n to
CIO n+6
CIO n+7
Data storage
area
Read
data
CS/CJ-series CPU Unit
ID Sensor Unit
CIO n+
8
to CIO n+9
RF T
a
g
Summary of Contents for CJ1W-V680C11
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