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model 2000 DeviceNet Module Manual (DN611/DN611A)
Chapter 4 Operating Procedures for the DN611 (Software)
4
(4) Bit strobe output data area (0100H to 0103H: 4 words)
This area stores data that the DN611 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 (0080H to 00FFH: 128 words)
This area stores data that the DN611 outputs to slave devices in polling mode.
The S controller ladder program writes output data in this area. The area has a size
of 128 words (2048 bits), so unless the size of data the DN611 sends to slave devices
doesn't exceed the area capacity, up to 63 slave devices can be connected to one
DN611.
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 007FH: 128 words)
This area stores data collected by the DN611 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
128 words (2048 bits), so unless the size of data that slave devices send to the
DN611 doesn't exceed the area capacity, up to 63 slave devices can be connected to
one DN611.
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
0100H
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0101H
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
0102H
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
0103H
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
DN611
S controller
