Rockwell Automation 20-COMM-R Remote I/O Adapter - Manual (Page 47)

Using Discrete and Block Transfer I/O 4-11
20-COMM-R Remote I/O Adapter User Manual
Publication 20COMM-UM004D-EN-P
Example Ladder Logic
Program Information
The example ladder logic programs in the sections of this chapter are
intended for and operate PowerFlex 70 or PowerFlex 700 drives with the
20-COMM-R adapter in a 1/4 rack configuration.
Functions of the Example Programs
The example programs enable you to do the following:
• Receive Logic Status information from the drive.
• Send a Logic Command to control the drive (for example, start, stop).
• Send a Reference to the drive and receive Feedback from the drive by
Block Transfer I/O.
• Send/receive Datalink data to/from the drive by Block Transfer I/O.
• Access the drive using Block Transfer Messaging (see Chapter 5 , Using
Block Transfer Messaging ).
Adapter Settings for the Example Programs
All adapter hardware switches have been disabled and the following
parameters have been set:
• Parameter 3 - [RIO Addr Cfg] = 1
• Parameter 12 - [DPI I/O Config] = xxx0 0011
(Logic Command/Reference and Datalink A are enabled)
• Parameter 25 - [Start RIO Group] = Group 0
• Parameter 27 - [Rack Size] = 1/4 rack
Scanner Settings for the Example Programs
Data files, when used, are pointed out in the examples.
Logic Command/Status Words
These examples use the Logic Command word and Logic Status word for
PowerFlex 70/700 drives. See
Appendix D to view details. The definition of
the bits in these words can vary if you are using a different DPI drive. See
the documentation for your drive.