Communications Commands And Responses; Read (Rd) - Omron V720S Series Operation Manual

Communications Command
5-3

Communications Commands and Responses

This section describes commands and responses when BCC has been enabled. When BCC has
been disabled, BCC is not attached to either the command or response frames.

5-3-1 Read (RD)

This command reads data from a Tag in the communications area.
<Command Format>
STX Node No..
1 2
Communications
method
Data type
Tag
In ISO mode
type
*
In I.CODE1
mode (Tag
No. setting)
First read page
No. of read pages
* The setting number of each Tag type is valid only when it is within the range of each operating
mode in Reader/Writer.
<Response Format>
(1) Read data: there are responses according to the number of Tags in its communications area
when multi- communications method is executed.
STX Node No.
1 2
Communi- Data
Command
cations type
Code
method
"RD"
2 2
Specifies a communications method
ST: Single Trigger
SA: Single Auto
SR: Single Repeat
FT: FIFO Trigger
* For details, refer to 5-8 Communications Methods
Specifies whether the read data is represented in ASCII or HEX.
A : ASCII code
H : HEX code
* For details, refer to 5-9 Data Type
Specifies the Tag type.
A: I.CODE2 chip
Set the number of Tags which communicate simultaneously.
0 : when executing single or FIFO communications
"1 to 7" : when executing multi-communications
* For details, refer to 5-10 Tag Number Setting.
Specifies the first page in hexadecimal to read from the Tags.
Specification range: 00 to FFh
chip)
Specification range: FB to 0Ah
* For details, refer to 2-4 Memory Map of Tag.
Specifies the number of pages in hexadecimal to read from the Tags.
Specification range: 01 to FFh
Specification range: 01 to 10h
Retry Command Response
Flag Code Code
"RD" "00"
1 2 2
Tag First read No. of read
type page
1 1 2
FA: FIFO Auto
FR: FIFO Repeat
MT: Multi Trigger
MR: Multi Repeat
(in ISO mode: 00 to 1Bh for I.CODE2
(in I.CODE1 mode)
(in ISO mode: 01 to 1Ch for I.CODE2)
(in I.CODE1 mode)
UID(SNR)
16
ETX BCC
pages
2 1 1
Read data ETX BCC
As specified 1
Section 5-3
1
5-9