Example ladder logic rung, Explanation of source and destination data, 14 using explicit messaging – Rockwell Automation 1203-EN1 EtherNet/IP-to-SCANport Module User Manual
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6-14
Using Explicit Messaging
Example Ladder Logic Rung
Figure 6.13 Example Set Attributes Scattered Message
Explanation of Source and Destination Data
The data structures in
use 16-bit words and can set up to 40
parameters in a single message. In the Response Message, a parameter
number with the high bit set indicates that the associated pad word field
contains an error code.
Figure 6.14 Data Structures for Set Attributes Scattered Messages
Writes a scattered group of parameters (not a contiguous block).
18
PerformScatteredWrite
EN
DN
ER
Type - CIP Generic
Message Control
ScatteredWriteMessage ...
MSG
Writes a scattered group of parameters (not a contiguous block).
Request (Source Data)
Response (Destination Data)
Word 0 Parameter Number
Word 0 Parameter Number
1 Parameter Value
1 Pad Word or Error Code
2 Parameter Number
2 Parameter Number
3 Parameter Value
3 Pad Word or Error Code
4 Parameter Number
4 Parameter Number
5 Parameter Value
5 Pad Word or Error Code
6 Parameter Number
6 Parameter Number
7 Parameter Value
7 Pad Word or Error Code
8 Parameter Number
8 Parameter Number
9 Parameter Value
9 Pad Word or Error Code
10 Parameter Number
10 Parameter Number
11 Parameter Value
11 Pad Word or Error Code
...
...