Rockwell Automation 22-COMM-D DeviceNet Adapter - Manual (Page 76)

7-4 Using Multi-Drive Mode
The DeviceNet specification requires that the terms input and output be
defined from the scanner’s point of view. Therefore, Output I/O is data
that is output from the scanner and consumed by the DeviceNet adapter.
Input I/O is status data that is produced by the adapter 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 adapter and
Parameter 15 - [DSI I/O Cfg]. The image table always uses
consecutive words starting at word 0.
Figure 7.5 illustrates the Multi-Drive I/O image with 16-bit words.
Figure 7.5 Multi-Drive Example of I/O Image
Understanding the I/O Image
Controller Scanner Adapter
PowerFlex Drive 0
DeviceNet DSI
Output
Image
(Write)
Input
Image
(Read)
Message
Handler
Message
Buffer
Word and I/O
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
PowerFlex Drive 1
PowerFlex Drive 2
PowerFlex Drive 3
PowerFlex Drive 4
PowerFlex Drive 0
PowerFlex Drive 1
PowerFlex Drive 2
PowerFlex Drive 3
PowerFlex Drive 4