Mitsubishi Electric GOT2000 Series Connection Manual page 92

(4) Setting of the mask type (MELSEC-FX)
Set the item for monitoring or writing only the specified bits of the buffer memory.
(a) Mask type 0
Monitor and write the buffer memory value directly.
(b) Mask type 1
• (For 16 bits)
Monitor and write only b0 to b3 of the buffer memory.
Example:
The monitor value is 0001H when monitoring BM=4321H as mask type 1.
BM0=0001H when writing input value 4321H to BM0=0000H as mask type 1.
• (For 32 bits)
Monitor and write only b0 to b3 and b16 to 19 of the buffer memory.
Example:
The monitor value is 00050001H when monitoring BM0=87654321H as mask type 1.
BM0=00050001H when writing input value 87654321H to BM0=00000000H as mask type 1.
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POINT POINT POINT
Mask type
The mask type is effective when using for the buffer memories divided per 4 bits, such as an
analog input block.
Monitor value
Input value
BM0
(Before writing)
BM0
(After writing)
BM0
Monitor value
Input value
BM0
(Before writing)
BM0
(After writing)
BM0 4 3 2 1
H
0 0 0 1
H
4 3 2 1
H
0 0 0 0
H
0 0 0 1
H
8 7 6 5 4 3 2
0 0 0 5 0 0 0
8 7 6 5 4 3 2
0 0 0 0 0 0 0
0 0 0 5 0 0 0
1
H
1
H
1
H
0
H
1
H