System Commands And Responses - Omron V720 Series Operation Manual

Communications Commands and Responses

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
1 2
Communications
Data type
Tag Number setting
· 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.
1 2
· Response Frame Structure for Selective Access (excluding end Tag detection response)
Node No.
TX
1 2
Response code
Serial Number
5-18
Communi-
code cations
"RD"
2 2
Specifies a communications method.
ST: Single Trigger
SA: Single Auto
SR: Single Repeat
FT: FIFO Trigger
FR: FIFO Repeat
"H" fixed (HEX code)
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
Retry
Command Response
flag
code code
"RD" "00"
1 2 2
Retry Command Response
flag
code code
"RD" "00"
1 2 2
00: Normal end
For other response codes, refer to 5-10 Response Code List.
Written on each ID Tag at the time of factory shipments. This number cannot be
overwritten.
Data Tag Fixed
type No.
"**"
"H" setting
1 1 2
MT: Multi-trigger
MR: Multi-repeat
LT: Selective Access (Tag detection)
□□
(For
available.)
(UT: Special Read Trigger
UA: Special Read Auto
UR: Special Read Repeat)
For details, refer to 5-5 Communications
Methods.
Serial No.
16
Temporary Serial no
No.
2
Section 5-3
Fixed ETX BCC
"**"
2 1 1
: Selective Access (read)
□□
, the values from "00" to "7F" are
ETX BCC
1 1
ETX BCC
16 1 1