Rockwell Automation MD65 Profibus Communication Card - Manual (Page 65)

Using Multi-Drive Mode 8-5
8.3 Understanding the I/O Image
The terms input and output are defined from the scanner’s point
of view. Therefore, Output I/O is data that is output from the
scanner and consumed by the Profibus module. Input I/O is status
data that is produced by the module and consumed as input by
the scanner. The I/O image table will vary based on the:
Configuration of the Mode Jumper (J2) on the module and MDI
I/O Cfg (parameter 11). The image table always uses consecutive
words starting at word 0.
Figure 8.6 illustrates the Multi-Drive I/O image with 16-bit words.
Figure 8.6 – Multi-Drive Mode Example of I/O Image
Controller Scanner Adapter
Word and I/O
Profibus MDI
Output
Image
(Write)
Input
Image
(Read)
Message
Handler Message
Buffer
0 Logic Command
1 Reference
2 Logic Command
3 Reference
4 Logic Command
5 Reference
6 Logic Command
7 Reference
8 Logic Command
9 Reference
0 Logic Status
1 Feedback
2 Logic Status
3 Feedback
4 Logic Status
5 Feedback
6 Logic Status
7 Feedback
8 Logic Status
9 Feedback
MD65 Drive 0-2
MD65 Drive 0
MD65 Drive 0-1
MD65 Drive 0-3
MD65 Drive 0-4
MD65 Drive 0
MD65 Drive 0-1
MD65 Drive 0-2
MD65 Drive 0-3
MD65 Drive 0-4