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model 3000 DeviceNet Module Manual (DN311/DN311A)
Chapter 4 Operating Procedures for the DN311 (Software)
4
(4) Bit strobe output data area (02F4H to 02F7H: 4 words)
This area stores data that the DN311 outputs to slave devices in bit strobe mode.
The S controller ladder program writes output data in this area. The transmitting data
in bit strobe mode is fixed at 8 bytes (64 bits).
The relationship between the bits in this area and slave device node addresses is
shown below.
(5) Polling output data area (017AH to 02F3H: 378 words)
This area stores data that the DN311 outputs to slave devices in polling mode.
The S controller ladder program writes output data in this area. The area has a size
of 378 words (6048 bits), so unless the size of data the DN311 sends to slave devices
doesn't exceed the area capacity, up to 63 slave devices can be connected to one
DN311.
Allocation of output data to slave devices to this area is explained in 4.2.3 Allocating
slave device data to the input/output data area.
(6) Polling/bit strobe input data area (0000H to 0179H: 378 words)
This area stores data collected by the DN311 from the slave devices in polling mode
and bit strobe mode.
The S controller ladder program reads data from this area. The area has a size of
378 words (6048 bits), so unless the size of data that slave devices send to the
DN311 doesn't exceed the area capacity, up to 63 slave devices can be connected to
one DN311.
Allocation of input data from slave devices to this area is explained in 4.2.3 Allocating
slave device data to the input/output data area.
Figure 4-8 shows a sketch of the input/output data areas.
Figure 4-8 Sketch of Input/Output Data Areas
Table 4-1 Bit Strobe Output Data Area Configuration
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
02F4H
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
02F5H
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
02F6H
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
02F7H
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
Polling
Slave
Slave
Bit strobe
Bit strobe output
data area
Polling output data
area
Polling/bit strobe
input data area
MWRITE
instruction
MREAD
instruction
Output area
register area
Input data
register area
DN311
S controller
