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5-17
5-7-1 Read
Reads data from a tag.
<Command Format> * A figure below shows the number of characters.
Command code and communication designation
Start address, number of read bytes
DA
Destination (antenna) station number. "00" to "31". This can be
modified in "5-9-8 Station Number Setting".
Initial value "00"
SA
Source (host device) station number. "80" to "89". If only one host device is used, specify "80".
Command code
Specify according to the table below.
Communication designation
Split flag
Specify "A".
Code designation
Specify whether data read out of a tag is ASCII code or hexadecimal code.
A: ASCII code
H: Hexadecimal code
Start address
Specify according to the table below.
Number of read bytes
Command
Tag status after
execution
Command
code
Communica-
tion designation
Remarks
Single Trigger
Sleep
R3
SU
Single Trigger
Standby
WU
Any other command can be executed to the tag immediately after it.
Multi Trigger (approximately 4 tags)
Sleep
SS
Multi Trigger (approximately 8 tags)
SM
Multi Trigger (approximately 16 tags)
SL
Single Auto
Sleep
R6
SU
Single Auto
Standby
WU
Any other command can be executed to the tag immediately after it.
Polling Single Auto
CU
Single Repeat
Sleep
R9
SU
FIFO
Multi Repeat (approximately 4 tags)
SS
Multi Repeat (approximately 8 tags)
SM
Multi Repeat (approximately 16 tags)
SL
Polling Single Repeat
RU
For a query command of polling, refer
to "5-8-3 Request To Respond".
Polling Multi Repeat (approximately 4 tags)
RS
Polling Multi Repeat (approximately 8 tags)
RM
Polling Multi Repeat (approximately 16 tags)
RL
Read content
Start address
Number of read bytes
ASCII code
Hexadecimal code
Data
Reading start address
("0000" to "1FFF")
* Hexadecimal number
Specify the number of read bytes
("0001" to "2000")
* Hexadecimal number
Specify the number of read bytes
("0001" to "2000")
* Hexadecimal number
Write Protect setting
"WPRO"
Unavailable
"0004" * Refer to Section 3-6.
Date of production
"DATE"
"0008" * Refer to Section 2-2-3.
Waiting time for sleep
"SLEP"
"0004" * Refer to Section 3-7.
Split flag
Command
code
Communi-
cation des-
ignation
Code designation
Start address
Number of
read bytes
(BCC)
* It can be specified whether BCC is enabled or disabled.
5-7 Tag Communication Command