Rockwell Automation 1336T ControlNet Frn1.02 Rev 1.5 - Manual (Page 85)

4–43 Using Unscheduled Messaging
Publication 1336 FORCE–5.18 ––March, 1999
The links are then defined, followed by each sink’s corresponding
source in the remainder of the header message. You can define up to
30 scattered links with this function. If an incorrect link is defined,
the PMR response returns a negative value for the sink parameter,
followed by a status or error code.
If there is an error in the block transfer, word 2 of the PMR contains
a value of -32763.
Example
In this example, four scattered links were written to the drive as
defined in word 3 of the PMW. Words 4 and 5 (N7:3 and N7:4)
contain the first link with word 4 defining the sink parameter, and
word 5 the corresponding source. Words 6 and 7 (N7:5 and N7:6)
contain the next link, in the order of sink-to-source. The remaining
two links are contained in words 8 through 11 (N7:7-10). The PMR
responds with 0 in place of the source parameter to indicate a
successful link.
1 0
N7:0
2 3 4 5 6 7 8 9
N7:20
PLC MSG
Write File
Data Format
4 387 11
331
-32763 146 388 168 367 330 368
N7:90
N7:100
PLC MSG
Read File
4 387 0
0
5 0 388 0 367 0 368
Scattered Parameter Link Write
(continued)