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25
The User Program
Section 2-3
The number of check area bytes is 256 (0100) maximum and the number of
command data words is fixed at 5.
If the check codes do not coincide, the DC warning bit (word n+4 bit 07) will
be turned ON.
Command Processing
All the check areas that are designated by the first address and number of
bytes except the last two bytes is collectively the calculation objective area.
The last two bytes are used as the check code area.
If check code calculation or check code writing is designated using processing
code K, the CRC of the data in the calculation objective area is calculated and
the result is written to the check code area, in which case if the check block is
a write protection area, a write protection error will result.
If data collation is designated using processing code C, the CRC of the data in
the calculation objective area is calculated and the result is compared with the
data in the check code area. If they do not coincide, the DC warning bit will be
turned ON.
15
M
4
D
K/C
4B/43
2
*
A
00
D
4
4
1
3
1
0
D
Terminator
Select K to designate
data check code
calculation and C to
designate data check
collation.
Memory management command
R/W Head no. (fixed to 1)
Designates the first address of the check
area within the range 0000 through FFFF.
Designates the number of check area
bytes within the range 0003 through 0100.
Содержание SYSMAC C200H-IDS01-V1
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