2 - 8
(4) Setting of the mask type (MELSEC-FX)
Set the item for monitoring or writing only the specified bits of the buffer memory.
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.
(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.
BM0
Monitor value
H
4
3
2
1
0
0
0
1
H
BM0
(Before writing)
(After writing)
BM0
Input value
H
4
3
2
1
0
0
0
0
H
0
0
0
1
H
H
BM0
8
7
6
5
4
3
2
1
0
0
0
5
0
0
0
1
H
Monitor value
H
BM0
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
H
Input value
BM0
0
0
0
5
0
0
0
1
H
(Before writing)
(After writing)
Summary of Contents for GOT2000 Series
Page 2: ......
Page 84: ......
Page 432: ...6 58 6 6 Precautions ...
Page 578: ...9 54 9 6 Precautions ...
Page 726: ...12 84 12 5 Precautions ...
Page 756: ......
Page 822: ...14 66 14 4 Device Range that Can Be Set ...
Page 918: ...15 96 15 7 Precautions ...
Page 930: ...16 12 16 6 Precautions ...
Page 964: ......
Page 1002: ...19 38 19 7 Precautions ...
Page 1022: ...20 20 20 5 Precautions ...
Page 1023: ...MULTI CHANNEL FUNCTION 21 MULTI CHANNEL FUNCTION 21 1 ...
Page 1024: ......
Page 1054: ...21 30 21 5 Multi channel Function Check Sheet ...
Page 1055: ...FA TRANSPARENT FUNCTION 22 FA TRANSPARENT FUNCTION 22 1 ...
Page 1056: ......
Page 1223: ......
