Omron V600 Series User Manual page 90

Section 5
Communications
■ 1:N Communications
Command
Controller No.
@ x x
3
Data code specification
R/W Head No.
Read area start address
No. of read bytes
Response
Less than 246 Characters in Read Data
Controller No.
@ x x
3
End code
Read data
More Than 245 Characters in Read Data
XR A/H
@Controller No.
RFID System
88
Operation Manual
Data code
R/W Head No.
Command specifica-
Read area start address
code
tion
x R A/H 1/2 x x
2 1 1 4
Specifies the type of code in which to send the read data in the response.
A: ASCII
H: Hexadecimal
Specifies the Read/Write Head with which to communicate.
1: Read/Write Head 1
2: Read/Write Head 2
Specifies the first address from which to read data from the Data Carrier as a four-digit hexadeci-
mal number.
Specifiable range: 0000H to FFFFH
Specifies the number of bytes of data to read from the Data Carrier as a four-digit hexadecimal
number. Up to 2048 bytes can be read with one command.
Specifiable range: 0001H to 0800H
• ASCII specification: 2048 bytes (2048 characters)
• Hexadecimal code specification: 2048 bytes (4096 characters)
Command
End code
Read data
code
x R 0 0 x x
2 2
Indicates the results of command execution.
An end code of 00 is returned for a normal end.
Refer to End Codes for more information.
p.135
The data read from Data Carrier memory.
The number of characters will be the same as the number of read bytes for ASCII data and twice the
number of read bytes for hexadecimal data.
Host device
1/2 Start address No. of read bytes
FCS
@Controller No. FCS
@Controller No. FCS
:
@Controller No. FCS
@Controller No. FCS
No. of read bytes
x x x x x x
4
FC S Terminator
x x x x * C R
n 2
2
1 frame = 256 characters max.
*CR
@Controller No. XR 00
ASCII: 249 characters,
CR
Hexadecimal code: 248 characters
@Controller No.
CR
CR
@Controller No.
ASCII: 249 characters or less,
CR
Hexadecimal code: 248 characters or less
@Controller No.
FCS
Terminator
x x * CR
2
2
ID Controller
ASCII: 245 characters,
Hexadecimal code: 244 characters
Read data 1 FCS
Read data 2 FCS
Read data n-1 FCS
FCS
Read data n
CR Frame 1
CR Frame 2
:
Frame
CR
n-1
*CR Frame n