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5-6
Section
Communications Commands
82
5-6-5 SERIAL NUMBER READ: RD
Reads the serial number written to the ID Tag in the factory.
Command Frame Structure
STX
Node No.
Command
code
RD
Commu-
nications
ETX
BCC
“H”
“1”
“
* *
”
“
* *
”
Communications
Specify the communications method with the Tag.
ST:
Single trigger
MR: Multi-repeat
SA: Single auto
L
j
: Selective access
SR: Single repeat
(
j
=
*
for Tag detect, ID number 0 to F for Tag specify.)
FT:
FIFO trigger
QT: Quick Trigger
FA: FIFO auto
QA: Quick Auto
FR: FIFO repeat
QA: Quick Repeat
ME: Multi-trigger
Response Frame Structure
STX
Node No.
Retry
Flag
Command
code
RD
Response
code
00
ID code
(serial number)
ETX BCC
8
Response Frame Structure for Selective Access Function (Excluding Detection Completed Response)
STX
Node No.
Retry
Flag
Command
code
RD
Response
code
00
ETX BCC
ID
No.
ID code
(serial number)
1
2
2
2
1
1
8
1
1
Note
1. The Tag’s serial number cannot be overwritten.
2. The data type must be set to hexadecimal (H). A command error will occur if
ASCII data is specified.
5-6-6 POLLING AUTOREAD: PR
When the host sends POLLING AUTOREAD command to the Controller, the
Controller immediately returns a response to the host indicating the acceptance
of the command. Then the Controller waits for the approaching ID Tag and reads
the data of the ID Tag when the ID Tag is in the communications area of the An-
tenna. When the Tag is in the communications area, the host can use a POL-
LING subcommand to check the results of the processing of the command.
Command Frame Structure
STX
Node No.
Command
code
PR
Data
type
Chan-
nel
First read
address
No. of
read bytes
ETX
BCC
1
2
2
1
2
2
1
1
1
Data type
Specify whether the data read from the Tag is ASCII or Hex.
A: ASCII code
H: HEX code
Channel
Always 1.
First read address
Specify in Hex the first address of the data to be read from the Tag.
Setting range: 00h to EFh
No. of read bytes
Specify in Hex the number of bytes of data to be read from the Tag.
Setting range: 01h to F0h (reading ASCII data)
01h to 80h (reading Hex data)
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