Rockwell-automation 1203-EN1 EtherNet/IP-to-SCANport Module Manual de usuario Pagina 75

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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 Figure 6.10 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
...
...
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