Omron V680-CA5D01-V2 User Manual page 210

POLLING AUTO READ (PR)
When the ID Controller receives a POLLING AUTO READ command from the host device, it immedi-
ately sends a response acknowledging that the command was received. Data is then read when a Tag
approaches. During this interval, subcommand can be used to check on the command processing
results. Command can also be sent to the other Antenna during this interval.
1:1 Protocol
Command
Antenna
designation
Data
Read area start
Command
desig-
address
code
nation
× × ×
P R A/H 1/2
2 1 1 4
Data designation
Antenna designation
Read area start address
No. of bytes to read
Response
Command
Terminator
End code
code
*
P R 7 4 CR
2 2 2
End code
No. of bytes
to read
Terminator
*
× × ×
CR
2
2
Specifies the code format when sending the read data response.
"A": ASCII
"H": Hexadecimal
Specifies the Antenna with which to communicate.
"1": Antenna 1
"2": Antenna 2
Specifies the start address of the area in the Tag from which data is to be read from in 4-digit
hexadecimal.
Setting range: 0000 to FFFF
H H
Specifies the number of bytes of data to read from the Tag in 2-digit hexadecimal.
Up to 256 bytes can be read with one command.
Setting range: 00 to FF Specify 00H for 256 bytes.)
H (
• ASCII: 256 bytes (256 characters)
• Hexadecimal: 256 bytes (512 characters)
Indicates the execution result for the command.
"74": Polling command received
The only error codes that may be returned here are 74 and communications errors with the host
device.
Refer to List of End Codes for information on other end codes.
p. 235
SECTION 5
Communications
RFID System
207
User's Manual