3 - 9
3 - 9
3. SPECIFICATIONS
3.4 Buffer Memory
Buffer memory refers to an area that stores read/write data and control information for
exchanging data between ID tags and the programmable controller CPU.
The buffer memory can be accessed by the MOV command from the sequence program.
Note that the contents of buffer memory return to default values at power OFF and
programmable controller CPU reset.
3.4.1 Buffer memory list
The following table lists the buffer memory of the RFID interface module.
Table 3.5 Buffer memory list
Address
Intelligent Function Module Device
CH.1 CH.2
Buffer Memory Address Name
Initial
Value
R/W*
1
Reference
Un
\
G0 Un
\
G4000
Command code specification area
0
R/W
Section 3.4.2 (1)
Un
\
G1 Un
\
G4001 Communication
specification area
0
R/W
Section 3.4.2(2)
Un
\
G2 Un
\
G4002
Processing specification area
0
R/W
Section 3.4.2(3)
Un
\
G3 Un
\
G4003
Head address specification area
0
R/W
Section 3.4.2(4)
Un
\
G4 Un
\
G4004
No. of processing points specification area
0
R/W
Section 3.4.2(5)
Un
\
G5 Un
\
G4005
Command option specification area
0
R/W
Section 3.4.2(6)
Un
\
G6 to Un
\
G9 Un
\
G4006 to Un
\
G4009 Use
prohibited
─
─
──
Un
\
G10 Un
\
G4010
Auto command wait time setting area
0
R/W
Section 3.4.2(7)
Un
\
G11 Un
\
G4011
Processing result monitor switch setting area
0
R/W
Section 3.4.2(8)
Un
\
G12 to Un
\
G39 Un
\
G4012 to Un
\
G4039 Use
prohibited
─
─
──
Un
\
G40 Un
\
G4040
Module status storage area
0
R
Section 3.4.2(9)
Un
\
G41 Un
\
G4041
Error details storage area
0
R
Section 3.4.2(10)
Un
\
G42 Un
\
G4042
Processing result monitor storage area
0
R
Section 3.4.2(11)
Un
\
G43 to Un
\
G89 Un
\
G4043 to Un
\
G4089 Use
prohibited
─
─
──
Un
\
G90 to Un
\
G93 Un
\
G4090 to Un
\
G4093 ID tag UID storage area (8 bytes)*
2
0
R
Section
3.4.2(12)
Un
\
G94 to Un
\
G99 Un
\
G4094 to Un
\
G4099 Use
prohibited
─
─
──
Un
\
G100 to Un
\
G1123 Un
\
G4100 to Un
\
G5123 Data storage area (2,048 bytes)
0
R/W
Section 3.4.2(13)
Un
\
G8000
Test operation mode specification area
0
R/W
Section 3.4.2(14)
Un
\
G8001
Test operation antenna specification area
0
R/W
Section 3.4.2(15)
Un
\
G8002
No. of processing points during testing
specification area
0 R/W
Section
3.4.2(16)
*1. Read and write are enabled/disabled from the sequence program. R: Read enabled,
W: Write enabled.
*2. Does not change according to the setting contents of the data storage order of the
processing specification area (Un
\
G2, Un
\
G4002).
Point
Use-prohibited buffer memory is used by the system and cannot be used by users.
If you execute read or write with this buffer memory in the sequence program,
normal operation cannot be guaranteed.
3.4.2 Buffer memory details
(1) Command code specification area (Un
\
G0, Un
\
G4000)
This area is used to specify the processing contents for ID tags using command codes.
For command code details, refer to Section 6.2, “Command Specification List.”
