Communications Commands and Responses
Section 5-3
5-18
5-3-6
System Commands and Responses
1)
Serial Number Read (RD)
This command is used for reading a unique 64 bit serial number.
Command frame structure
STX
Node No. Command
code
“RD”
Communi-
cations
Data
type
“H”
Tag
No.
setting
Fixed
“
**
”
Fixed
“
**
”
ETX
BCC
1
2
2
2
1
1
2
2
1
1
Communications
Specifies a communications method.
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 “00” to “7F” are
available.)
(UT: Special Read Trigger
UA: Special Read Auto
UR: Special Read Repeat)
For details, refer to 5-5 Communications
Methods.
Data type
“H” fixed (HEX code)
Tag Number setting
In the Selective Access (read), Single, and FIFO Accesses, the Tag Number setting
is “0” fixed.
In the Multi Access and Selective Access (Tag detect) command, set the number of
Tags with which to communicate simultaneously.
Refer to 5-7 Tag Number Setting for details.
Setting range: 0 to 7
·
The serial number of a Tag is not changeable.
·
For code representation, only HEX code is available.
Response Frame Structure
·
Response frame structure for Single, FIFO, and Multi Accesses (excluding end detection re-
sponse)
STX
Node No.
Retry
flag
Command
code
“RD”
Response
code
“00”
Serial No.
ETX BCC
1
2
1
2
2
16
1
1
·
Response Frame Structure for Selective Access (excluding end Tag detection response)
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 end
For other response codes, refer to 5-10 Response Code List.
Serial Number
Written on each ID Tag at the time of factory shipments. This number cannot be
overwritten.
