Omron V680-CA1D User Manual page 62

Section 4
Reading from/Writing to Tags
FCS Calculation Example
FCS (Frame Check Sequence) refers to 8-bit data with an exclusive OR (XOR) executed from the start
of the frame (@ symbol) until the final character, converted into 2-bit ASCII.
• Reading 5 Bytes from Address 0010H
Controller No.
@ 0
Read data
Heat-resistive RFID System
60
User's Manual
Command code
2 R D H 1
FCS calculation range
@
0
2
R
Converting to
D
ASCII
H
1
0
0
1
0
0
5
Data
0 0 1 0 0
ASCII Hexadecimal
40
30
32
52
Converting to
44
hexadecimal
48
31
30
30
31
30
30
35
0010
FCS Terminator
*
5 2 8
0100 0000
XOR
0011 0000
XOR
0011 0010
XOR
0101 0010
XOR
0100 0100
XOR
0100 1000
XOR
0011 0001
XOR
0011 0000
XOR
0011 0000
XOR
0011 0001
XOR
0011 0000
XOR
0011 0000
XOR
0011 0101
Exclusive OR (XOR)
1000
Converting to
ASCII
FCS data: 28
CR