User's Manual

5-4 Communication Commands
5-4
5-28
5-4-1 Read (RD)
This command reads data from a Tag in the communications area.This is also used to read
some system areas in I.CODE1.
<Command Format>
STX Node No..
Command
Code
“RD”
Communic
ations
method
Data
type
Tag
type
First read
page
No. of
read pages
ETX BCC
1 2 2 2 1 1 2 2 1 1
Communications
method
Specifies a communications method
ST: Single Trigger FA: FIFO Auto
SA: Single Auto FR: FIFO Repeat
SR: Single Repeat MT: Multi Trigger
FT: FIFO Trigger MR: Multi Repeat
*Refer to SECTION 5-3-4 Communication Mode List for details.
Data type Specifies whether the read data is represented in ASCII or HEX.
A : ASCII code
H : HEX code
*Refer to SECTION 5-3-6 Specifying a Data Code for details.
In ISO mode
Specifies the Tag type.
A: I.CODE SLI chip
Tag
typ
e
*
In I.CODE1
mode (Tag No.
setting)
Set the number of Tags which communicate simultaneously.
0 : when executing single or FIFO communications
“1 to 7” : when executing multi-communications
*Refer to SECTION 5-2-5 Specifying a Tag Code for details.
First read page Specifies the first page in hexadecimal to read from the Tags.
Specification range: 00 to FFh (in ISO mode: 00 to 1Bh for I.CODE
SLI chip)
Specification range: FB to 0Ah (in I.CODE1 mode)
*Refer to SECTION 2-4 Memory Map of Tag for details.
No. of read pages Specifies the number of pages in hexadecimal to read from the Tags.
Specification range: 01 to FFh (in ISO mode: 01 to 1Ch for I.CODE
SLI)
Specification range: 01 to 10h (in I.CODE1 mode)
*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.
Retry
Flag
Command
Code
“RD”
Response
Code
“00”
UID(SNR) Read data ETX BCC
1 2 1 2 2 16 As specified 1 1
(2) Completion of communications (Multi/Trigger only): When the communications with
all tags in communications area is completed.
STX Node No
Retry
Flag
Command
Code
“RD”
Response
Code
“72”
ETX BCC
1 2 1 2 2 1 1
Response code 00: Normal completion
For other Response Codes, refer to SECTION 5-3-7 Response Code List.
UID (SNR) Indicates UID (SNR) having been read from a Tag.
When UID (SNR) (Tag-specific code) additional setting is valid, read
data will be preceded by UID. UID(SNR)
Read Data Indicates the data having been read from a Tag. The number of
characters of data is as follows.
ASCII code: No. of read pages x 4
HEX code: No. of read pages x 8