Omron SYSMAC C200H-IDS01-V1 Operation Manual page 43

The User Program
Usage:
Command:
Management of the
number of writing
operations
28
Using the write command, write in advance the number of desired overwriting
operations onto the overwriting operation management area of the DC.
After writing data to the most frequently used address, renew the number of
overwriting operations in order to check the life of the EEPROM. The number
of overwriting operations is determined for each address by the DC specifica-
tions. 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.
Subtracts an appropriate number [up to 255 (00FF)] from the data of the
address designated by the user in order to judge if the address has been
overwritten for the number of operations set by the user. If 0 ($0000) is sub-
tracted, only the life of the address will be checked. The number of command
data words is fixed to 5.
15
M
4 D 4
S
5 3 3
*
2 A 0
Note Designate the first address on the EEPROM DC so that the terminator will be
@@@0 to @@@5 or @@@8 to @@@D, otherwise an address error will result.
Writing the number of overwriting
Initialization
operations
stage
Write
stage
Renewal of the number of writing
operations/Life checking
Life check
stage
00
Memory management command
D
4
1 R/W Head no. (fixed to 1)
1
Designates the first address of the
management area within the range 0000
through FFFF (see note).
Designates the number of subtracting
operations within the range 0000 through 00FF.
Terminator
D
Data writing
Life checking
Section 2-3