Example ladder logic rung, Explanation of source and destination data, Using explicit messaging 6-11 – Rockwell Automation 1203-EN1 EtherNet/IP-to-SCANport Module User Manual
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Using Explicit Messaging
6-11
Example Ladder Logic Rung
Figure 6.9 Example Get Attributes Scattered Message
Explanation of Source and Destination Data
The data structures in
uses 16-bit words and can get up to 40
parameters in a single message. In the Response Message, a parameter
number with the high bit set indicates that the associated parameter value
field contains an error code.
Figure 6.10 Data Structures for Get Scattered Attributes Messages
Reads a scattered group of parameters (not a contiguous block).
17
PerformScatteredRead
EN
DN
ER
Type - CIP Generic
Message Control
ScatteredReadMessage ...
MSG
Reads a scattered group of parameters (not a contiguous block).
Request (Source Data)
Response (Destination Data)
Word 0 Parameter Number
Word 0 Parameter Number
1 Pad Word
1 Parameter Value
2 Parameter Number
2 Parameter Number
3 Pad Word
3 Parameter Value
4 Parameter Number
4 Parameter Number
5 Pad Word
5 Parameter Value
6 Parameter Number
6 Parameter Number
7 Pad Word
7 Parameter Value
8 Parameter Number
8 Parameter Number
9 Pad Word
9 Parameter Value
10 Parameter Number
10 Parameter Number
11 Pad Word
11 Parameter Value
...
...