Omron V600 Operation Manual page 30

Data Carrier
Example of Memory
Check Command Use
1, 2, 3...
When check code write is specified (transaction code: K), the CRC of the cal-
culation area data is calculated and written to the check code area. When data
comparison is specified (transaction code: C), the CRC of the calculation area
data is calculated and a comparison made with the check code area data. If
these are consistent, an end code (75) will be returned, and if they are inconsis-
tent an error code (76) will be returned.
Address
0000
0001
Area start address
Check block number
of bytes
Performing a data check from address 0010
1. If the following data is stored.
0010
0011
0012
0013
0014
2. Execute "MDK1001005" (calculation transaction).
The CRC code (5CD6) calculated from "123456" will be written to addresses
0013 and 0014.
0010
0011
0012
0013
0014
CRC (Upper digits)
CRC (Lower digits)

to 0012
H
12
H
34
H
56
H
12
H
34
H
56
H
5C
H
D6
H
Section 2-9
Check code
calculation area
(number of check
block bytes: 2)
Check code area
(2 bytes)

.
H
25