D-52
FX Series PLC User's Manual - Data Communication Edition
Computer Link
6 Control Procedures and Setting Methods
6.6 Transfer Data in Character Area
6.6 Transfer Data in Character Area
This section explains the transfer data in the character area sent and received between the computer and a
PLC using each command.
The transfer data explained below is handled as the character area B in reading and the character area C in
writing.
→ For character areas, refer to Subsections 6.4.1 and 6.4.2.
6.6.1 When bit device memory is read or written
The bit device memory is handled in 1-bit (1-point) units or in 1-word (16-point) units.
The transfer data in each case is explained below.
1) In 1-bit (1-point)
units
When the bit device memory is handled in 1-bit (1-point) units, a specified number of devices starting
from the specified head device are expressed in turn from the left end in "1 (31H)" for the ON status or "0
(30H)" for the OFF status.
Example: When indicating the ON/OFF status of five devices starting from M10
2) In 1-word (16-point)" units
When the bit device memory is handled in 1-word (16-point) units, one word is expressed in 4-bit units in
turn from the most significant bit in hexadecimal.
Example: When indicating the ON/OFF status of 32 devices starting from M16
4D
H
30
H
31
H
30
H
30
H
35
H
30
H
Head device
M 0 0 1 0
Number
of
devices
0 5
1 0 1 0 1
31
H
31
H
30
H
31
H
30
H
Indicates that M14 is ON.
Indicates that M12 is ON.
Indicates that M13 is OFF.
Indicates that M10 is ON.
Indicates that M11 is OFF.
4D
H
36
H
31
H
30
H
30
H
32
H
30
H
Head device
M 0 0 1 6
Number
of
devices
0 2
Data
A B 1 2
41
H
32
H
31
H
42
H
Data
3 4 C D
33
H
44
H
43
H
34
H
Because devices are handled in 16 point units,
the number of device is "02".
1 0 1 0000000000 1111111111111 0 0000 0
b15 b11b12b13b14 b9b10
b8 b5b6b7 b4 b1b2b3
b15 b11b12b13b14 b9b10
b8 b5b6b7 b4 b1b2b3b0 b0
M
31
M
17
M
18
M
19
M
20
M
21
M
22
M
23
M
24
M
25
M
26
M
27
M
28
M
29
M
30
M
35
M
36
M
38
M
37
M
39
M
40
M
41
M
42
M
43
M
44
M
45
M
46
M
47
M
16
M
33
M
34
M
32
AB DC4321
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