Rockwell Automation 22-COMM-C ControlNet Adapter - Manual (Page 52)

5-2 Using the I/O
The terms input and output are defined from the controller’s point of
view. Therefore, output I/O is data that is produced by the controller and
consumed by the adapter. Input I/O is status data that is produced by the
adapter and consumed as input by the controller. The I/O image table
will vary based on the configuration of the adapter:
• Operating Mode Jumper J7 (
Figure 2.1 )
• Parameter 12 - [DSI I/O Cfg]
The image table always uses consecutive words starting at word 0.
Figure 5.1 and Figure 5.2 illustrate examples of a Single drive I/O image
(16-bit words) for ControlLogix and PLC-5 controllers respectively.
Figure 5.1 Single Drive Example of I/O Image for ControlLogix
Figure 5.2 Single Drive Example of I/O Image for PLC-5
Single mode is the typical configuration, where one node consists of a
PowerFlex 40 or PowerFlex 400 drive with a 22-COMM-C adapter. For
Multi-Drive mode, where one node can consist of up to 5 drives, refer to
Chapter 7 , Using Multi-Drive Mode .
Understanding the I/O Image
Controller Scanner Adapter
Word and I/O
PowerFlex 40 Drive
ControlNet DSI
Output
Image
(Write)
Input
Image
(Read)
Message
Handler
Message
Buffer
0 Pad Word
1 Pad Word
2 Logic Status
3 Feedback
Logic Status
Feedback
Message
Handler
0 Logic Command
1 Reference Logic Command
Reference
Controller Scanner Adapter
Word and I/O
PowerFlex 40 Drive
ControlNet DSI
Output
Image
(Write)
Input
Image
(Read)
Message
Handler
Message
Buffer
0 Logic Status
1 Feedback Logic Status
Feedback
Message
Handler
0 Logic Command
1 Reference Logic Command
Reference