Omron V640 User Manual page 84

SECTION 4
Reading from/Writing to ID Tags
The command and response code details provided here are for 1:N protocol. The command format for 1:1
protocol is obtained by omitting the SOH, node number, and FCS data, as described in the previous pages.
■ READ
Reads any pages of data from the ID Tag. The maximum number of pages that can be read at one time
is 16.
Command
SOH Node No.
01h
Bit 7 -
Page Sys -
0* 0*
Designation
Value 00
* Always specify 0. If you specify 1 an error (Response code: 14) will occur.
Parameter description
Parameter
Page designation
Data Segment Area
The response code (when normal: 00) and the data in the specified pages are returned in ascending order of
page numbers.
Response
Response
SOH Node No.
01h 0
Example: Reading the data of pages 1 and 3 of node No.1
Data content of the ID Tag
Page 1
Page 2
Page 3
Page 4
CIDRW System
80
User's Manual
Command code
0 1 0 0
0 7 - 3 2 1
Sys Sys - Sys 17 16
0* 0* 0* 0/1 0/1
00 - 07
Pages are specified by setting the bits corresponding to pages that are to be read to 1 and setting
the other bits to 0, then converting the result to a hexadecimal character string.
Refer to page 125.
Page n
code
Data 1 ⋅ ⋅ ⋅
0
12h 34h 56h 78h
11h 22h 33h 44h
Page designation (8 characters)
0 7 6 - 1
15 14 13 - 8
0/1 0/1 0/1 ••• 0/1
00 - FF
Description
Read data
⋅ ⋅ ⋅
Data 8 Data 1
90h 12h 34h 56h
55h 66h 77h 88h
FCS
0 7 6 - 2 1
7 6 5 - 1 Sys Sys
0/1 0/1 0/1 ••• 0/1 0*
00 - FC
Page m (n<m) FCS
⋅ ⋅ ⋅ Data 8
CR
0Dh
0
0*
CR
0Dh