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27
The User Program
Section 2-3
Command
Add an appropriate number (up to 255 (00FF)) to the data of the address des-
ignated by the user in order to judge if the address has been overwritten
100,000 times. If 0 (0000) is added, only the life of the address will be
checked. The number of command data words is fixed at 5.
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.
When the command is executed and the address is found to have been over-
written 100,000 times, the DC warning bit will be turned ON.
Command Processing
Overwriting operation management area consists of three bytes from the first
address, to which the appropriate number (up to 255 (00FF)) that the user
designates is added. If the result is larger than 100,000, the DC warning bit
will be turned ON. If the area has been overwritten 100,000 times, the value in
the overwriting operation management area will not be renewed.
Management of
Overwriting Operations 2
By counting the number of writing operations, it is possible to detect if the DC
with EEPROM has been overwritten for the number of operations set by the
user.
A
0
15
M
4
D
L
2
*
00
D
4
4
1
3
1
D
4
C
Management of the number
of writing operations
Memory management command
R/W Head no. (fixed to 1)
Designates the first address of the management area
within the range 0000 through FFFF (see note).
Designates the number of adding operations
within the range 0000 through 00FF.
Terminator
First address
Upper digit
Middle digit
Lower digit
3 bytes
Содержание SYSMAC C200H-IDS01-V1
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