System Command
Section 5-4
5-24
5-4-4 SNR (Tag-specified Code) Read (RD): I.CODE1 Mode Only
This command read SNR (Tag-specified code) which incorporates I.CODE1 chip. Refer to 2-4 of
Section 2 Memory Map of Tag.
<Command Format>
STX
Node No..
Command code
“RD”
Communica-
tions method
Data
type
Tag
No.
setting
Fixed value
“
∗∗
”
Fixed value
“
∗∗
”
ETX BCC
1 2
2
2 1
1 2
2 1
1
Communications
method
Specifies the communications
method with a Tag.
ST: Single Trigger
SA: Single Auto
SR: Single Repeat
FT: FIFO Trigger
FR: FIFO Repeat
MT: Multi-trigger
MR: Multi-repeat
LT: Selective Access (Tag detection)
□□
: Selective Access (Read)
(For
□□
, the values from 00h to 7Fh
are available.)
UT: Special Read Trigger
UA:: Special Read Auto
UR: Special Read Repeat
For details, refer to 5-8 Communica-
tions Methods.
Data type
“H” fixed (HEX code)
For Single/FIFO/Selective Access (Read)
Set the number of Tags “0.”
Tag No. setting
For Multi/Selective Access (Tag detection command)
Set the number of Tags which communicate simultaneously.
* For details, refer to 5-10 Tag No. setting.
Specification range: 1 to 7
<Response Format>
(1) For Single/FIFO/Multi (except for the response of the completion of communications)
STX Node
No..
Retry
flag
Command code
“RD”
Response
code
“00”
Serial
No.
ETX
BCC
1 2 1 2
2 16
1
1
(2) For Selective Access (except for the response of the completion of Tag detection)
TX
Node No..
Retry
flag
Command code
“RD”
Response
code
“00”
Temporary
No.
Serial
No.
ETX
BCC
1 2 1 2
2
2 16
1
1
Response code
00:normal completion
For other response codes, refer to 5-2-4 Response code List.
Serial No.
Indicates serial number written to a Tag in advance. You cannot rewrite the
number.
Note
This command is for I.CODE1 Mode Only. The command is not available in
ISO mode:
