6-2
<Toc> <Ind>
<6. Module Access >
IM 34M6H28-01E
1st Edition : Feb.01,1999-00
6.2
I/O Data Register
The list of I/O data registers is shown in Table 6.3.
The I/O data registers that are not defined in Table 6.3 cannot be used.
Table 6.3
I/O Data Register List
Data Position Number
Data Name
Description
Ladder
BASIC
1 to 99
Module information
Register which stores the operation status, error code.
100 to 299
Control flag
Flag which controls message communication and I/O
communication for each node.
400 to 449
Tool command buffer
Register which stores the commands that perform settings
and information reading of this module (see Section 9.1.3,
“Basic Format of Commands”).
500 to 999
Input data buffer
Register in which the data input for slave is stored (see
Section 7.1, "Scan List").
1000 to 1499
Output data buffer
Register in which the data output for slave is stored (see
Section 7.1, “Scan List”).
1501 to 1550
Message communication
transmission buffer
Register in which the request command for message
communication is stored (see Section 8.2, “ Interface”).
1551 to 1600
Message communication
receive buffer
Register in which the response command for message
communication is stored (see Section 8.2, “Interface”).
T0603.EPS
■
Module Information
Module information displays the status of the module and communication status and the
settings. The list is displayed in Table 6.4.
Table 6.4
Module Information
Data Position
Number
Type*1
Contents
Explanation
Default Value
1
R
Status
Reflects the status of the module (X
■ ■ ■
01 to
16).
0
5
R
Data rate
Data rate 0:125; 1: 250; 2: 500 kbit/s
Switch set value
6
R
Node address
Node address 0 to 63
Switch set value
7
R
Transmission time
interval
Transmission time interval set value [msec]
Flash memory
stored value
8
R
Transmission time
interval measured
value
Transmission time interval measured value
[msec]
0
17
R
Error code *1
Error code of the module (EC1)
Cleared if Y
■ ■ ■
49 is turned on. (Latched type)
0
18
R
Error code*2
Error code of the module (EC2)
Cleared if Y
■ ■ ■
49 is turned on. (Latch type)
0
21 to 24*
2
R
Scan list information
The bits corresponding to the nodes registered
in the scan list are on.
Flash memory
stored value
25 to 28*
2
R
Status information of
other nodes
During scanning, the bits corresponding to the
nodes that are communicating normally with this
module are on.
0
29 to 32*
2
R
Information of the node
in error
The bits corresponding to the nodes in which a
communication error has occurred, are on.
Cleared if Y
■ ■ ■
49 is turned on. (Latched type)
0
T0604-1.EPS
*1
Type ....... Type of access available from the CPU module. (R: Read only)
*2
Bit position corresponding to the node address
Data position number
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
31
n
n+1
n+2
n+3
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
T0604-2.EPS
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