Omron V600 Series User Manual page 95

EXPANDED READ (ER)
For EXPANDED READ, the ID Controller reads up to 8 KB of data from Data Carrier memory. If there is
no Data Carrier in the communications area, an error response with an error code of 72 (Data Carrier
missing) will be returned.
■ 1:1 Communications
Command
Data code
R/W Head No.
specifica-
Read area start address
Command code
tion
E R A/H 1/2 x
2 1 1
Data code specification
R/W Head No.
Read area start address
No. of read bytes
Response
Less than 242 Characters in Read Data
End code
Command code
0 0
E R x x
2 2
More Than 240 Characters in Read Data
Host device
Start address
ER A/H 1/2
End code
Read data
No. of read bytes
x x x x x x
4 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 8192 bytes can be read with one command.
Specifiable range: 0001H to 2000H
• ASCII specification: 8192 bytes (8192 characters)
• Hexadecimal code specification: 8192 bytes (16384 characters)
Read data Terminator
x x * CR
n 2
No. of read bytes
*CR
ER
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.
Terminator
x * CR
2
ID Controller
1 frame = 245 characters max.
240 characters
Read data 1
00
240 characters
Read data 2
Read data n-1
240 characters or less
Read data n
Section 5
Communications
CR
Frame 1
20 ms
CR
Frame 2
:
CR
Frame n-1
CR
* Frame n
RFID System
93
Operation Manual