Omron SYSMAC C200H-IDS01-V1, Operation Manual

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31
The User Program
Section 2-3
2: Write protection (no)
End address available range:
00, 01 to 7F
Addresses between 80 to FD cannot be the end address. If the end address is
set to 00, addresses 01 to FD will be write-protected. Addresses FE and FF
are reserved for the system and the user cannot use these addresses.
Write Protection Example (DC with 254-byte Memory)
1,2,3... 1. In the following example, addresses 0001 to 0012 are write-protected.
2. If the end address is 00, all areas except address 0000 will be write-pro-
tected. In the following example, the end address is set to 00.
How to Cancel Write
Protection To cancel write protection, set the leftmost bit of address 0000 to 0. When
write protection is cancelled, the data in address 0000 will be null and void.
Note a) Address 0000 is never write-protected.
b) Write protection is effective from address 0001 through the suc-
ceeding addresses. This means that the user must write any data
Address Bit
7 6 5 4 3 2 1 0
0000 1 0 0 1 0 0 1 0
9 2
Address Bit
7 6 5 4 3 2 1 0
0000 1 0 0 0 0 0 0 0
8 0
0000
0001
0012
00FD
Write protected zone
Address
0000
0001
00FD
Address
Write protected zone