Omron SYSMAC C200H-IDS01-V1 Operation Manual page 41

The User Program
First address
No. of area bytes
Management of
Overwriting Operations 1
Usage
26
Address
0000
0001
CRC (upper digit)
CRC (lower digit)
Note The last two bytes of a check area are for the check code area, to which noth-
ing must be written.
By counting the number of writing operations, it is possible to detect if the
EEPROM DC has been overwritten for 100,000 times.
After writing data to the most frequently used address, renew the number of
overwriting operations in order to check the life of the EEPROM. It is possible
to overwrite data to each address for 100,000 times. Therefore, it is necessary
to count the number of overwriting operations of the most frequently used
address. It is also possible to check the life of the EEPROM without renewing
the number of overwriting operations.
Check code calculation area
(no. of check bytes − 2)
Check code area (2 bytes)
Right
Data right
stage
Renewal of the number of
writing operations/Life check
Life check
stage
Check area
Life check
Section 2-3