Omron V680-CA1D, Руководство пользователя

Страница: 64 / 113

62
S
ect
io
n
4
Communic
a
tions
Comma
nds
Heat-resistive RFID System
User's Manual
Section 4
Reading from/Writing to Tags
Communications Commands
READ (RD)
This command reads data from the Tag. If a Tag is not present, an error response (end code 72) is
returned.
• Example
Reading two bytes of data (hexadecimal code) from address 0010h of Controller No. 2.
Name Details
Data type Specifies the code format when sending the read data response.
A: ASCII
H: Hexadecimal code
Antenna designation Always 1
Start address Specifies the start address of the area in theTag from which data is to be read from in 4-digit
hexadecimal code.
The start address
Setting range: 0000h to 03E7h
Number of read bytes Specifies the number of bytes to be read from the Tag in 2-digit hexadecimal code.
The number of bytes that can be read at one time is as follows:
Setting range
ASCII: 256 bytes (256 characters), set value: 01h to FFh
Hexadecimal: 128 bytes (256 characters), set value: 01h to 80h
Name Details
End code Indicates the execution result for the command.
Read data Contains the data read from the Tag.
The number of characters is the number of read bytes for ASCII, and the number of read bytes
×
2 for hexadecimal code.
Command
× ×
Command code
R D
× ×
A/H 1
× ×
Data
type
Antenna
designation Start address
Number of
read bytes
2 1 1 4 2
× ×
FCS
2
Controller No.
@
× ×
3
*
CR
Terminator
2
Response
R D 0 0
Read data End code
2 2 n
× ×
FCS
2
@
× ×
3
*
CR
Terminator
2
Command code Controller No.
Command
0 2 R D 2 E
1 0 H 1 0 0
2 1 1 4 2 2
@
0 2
*
CR
2
3
Command code
Data
type
Antenna
designation Start address
Number of
read bytes
FCS Controller No. Terminator
Response
R D
0 0
2 2
5 4
FCS
2
@ 0 2
*
CR
2
1 1
2 2
3
Read data End code Terminator Command code Controller No.