Rockwell Automation 1336T ControlNet Frn1.02 Rev 1.5 - Manual (Page 77)

4–35 Using Unscheduled Messaging
Publication 1336 FORCE–5.18 ––March, 1999
The Continuous Parameter Link Read message returns a list of up to
60 parameters that are linked to each drive parameter in a
consecutive list.
PLC Block Transfer Instruction Data
PLC Message Write instruction length: 4 words
PLC Message Read instruction length: 5-64 words
Message Length
4
Header
Word 1 Header
Word 1
PLC Decimal Value
4
Header
Word 2 Header
Word 2
PLC Decimal Value
4 –– Message OK
-327664 –– Message Error
0
Data
Word 5
Number of Parameter
Links to Read
Data
Word 3
Starting Parameter
Number
Data
Word 4
Number of Parameter
Links to Read
Data
Word 3
Starting Parameter
Number
Data
Word 4
Data
Word 6
• Data
Word
Message Structure
• Data
Word
• Data
Word
Data
Word 64
Source Parameter
Number 1
Source Parameter
Number 2
Source Parameter
Number 60
PLC Request –– PLC Message Write
Drive Response –– PLC Message Read
Message Operation
The request must specify the number of links to be read and the
starting sink parameter number. The response returns the parameter
number of the source that is linked to each sink parameter. The
response returns links for a consecutive list of sink parameters (up to
60 links). If a parameter is not linked, a value of 0 is returned.
Link Read
Continuous Parameter Link Read