6 plc-5 example – Rockwell Automation DeviceNet Communications Module User Manual
Page 71
Using Explicit Messaging
7-11
7.6
PLC-5 Example
Data Format for a Read and Write Parameter
The data in this example is for an MD65 drive at node address 1.
Refer to section 7.2 for a description of the content of the data file.
Table 7.6 – Request Data for Read of Drive Parameter 39
Address Value (hex)
Description
Refer to ...
N11:0
0101
TXID = 01, Command = 01 (execute)
Section 7.3
N11:1
0006
Port = 00, Size = 06 bytes
Section 7.3
N11:2
0E01
Service = 0E (Get_Attribute_Single)
Page C-10
Address = 01 (Node Address)
Section 7.3
N11:3
000F
Class = 0F (Parameter Object)
Page C-8
N11:4
0027
Instance = Parameter 39 (27 hex)
N11:5
0001
Attribute = 01 (Parameter Value)
Page C-9
Table 7.7 – Response Data for Read of Drive Parameter 39
Address Value (hex)
Description
Refer to ...
N11:100
0101
TXID = 01, Status = 01 (successful)
Section 7.3
N11:101
0002
Port = 00, Size = 02 bytes
Section 7.3
N11:102
8E01
Service = 8E (successful),
Address = 01 (Node Address)
Section 7.3
N11:103
0064
Response Data = 1000 100 (64 HEX) = 10.0
seconds
Table 7.8 – Request Data for Write to Drive Parameter 101
Address Value (hex)
Description
Refer to ...
N11:0
0101
TXID = 01, Command = 01 (execute)
Section 7.3
N11:1
0008
Port = 00, Size = 08 bytes
Section 7.3
N11:2
1001
Service = 10 (Set_Attribute_Single)
Page C-10
Address = 01 (Node Address)
Section 7.3
N11:3
000F
Class = 0F (Parameter Object)
Page C-8
N11:4
0027
Instance = Parameter 39 (27 hex)
N11:5
0001
Attribute = 01 (Parameter Value)
Page C-9
N11:6
0064
Data = 100 (64 hex) = 10.0 seconds
Table 7.9 – Response Data for Write to Drive Parameter 101
Address Value (hex)
Description
Refer to ...
N11:100
0101
TXID = 01, Status = 01 (successful
transaction)
Section 7.3
N11:101
0000
Port = 00, Size = 00 bytes
Section 7.3
N11:102
9001
Service = 90 (successful)
Address = 01 (Node Address)
Section 7.3