Chapter 5, Using the i/o, About i/o messaging – Rockwell Automation 20-750-DNET PowerFlex DeviceNet Option Module User Manual
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Rockwell Automation Publication 750COM-UM002B-EN-P - October 2012
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Chapter
5
Using the I/O
This chapter provides information and examples that explain how to control,
configure, and monitor a PowerFlex 750-Series drive using the configured I/O.
About I/O Messaging
On CIP-based networks, including DeviceNet, I/O connections are used to
transfer the data which controls the PowerFlex drive and sets its Reference. I/O
can also be used to transfer data to and from Datalinks in PowerFlex 750-Series
drives.
The option module includes the Logic Command, Logic Status, Reference, and
Feedback (all as 32-bit words). This requires 8 bytes for the Input Size and 8
bytes for the Output Size in the controller’s I/O image. This basic I/O must
always be configured in the DeviceNet scanner using RSNetWorx for DeviceNet
software. Additional I/O, if needed, can be set using up to 16 Datalinks to write
data and/or up to 16 Datalinks to read data. When using any combination of
these Datalinks, add 4 bytes for each Datalink to the basic I/O Input Size and/or
Output Size.
, Configuring the Option Module, and
,
Configuring the I/O, discuss how to configure the option module and controller
on the network for the required I/O. The Glossary defines the different options.
This chapter discusses how to use I/O after you have configured the option
module and controller.
Topic
Page
Understanding the ControlLogix Controller I/O Image
Example Ladder Logic Program Information
ControlLogix Controller Example
ATTENTION: Risk of injury or equipment damage exists. The examples in this
publication are intended solely for purposes of example. There are many
variables and requirements with any application. Rockwell Automation does not
assume responsibility or liability (to include intellectual property liability) for
actual use of the examples shown in this publication.