Owner manual

Rockwell Automation Publication 750COM-UM007A-EN-P - January 2013 51
Chapter 6
Acyclic Messaging
This chapter provides information and examples that explain how to use Profinet
Acyclic Messaging to configure and monitor the PowerFlex 750-Series drive
through the option module.
About Acyclic Messaging
Acyclic messaging is used to transfer data that does not require continuous
updates to the PowerFlex 750-Series drive through the option module. Profinet
acyclic messaging is used to configure and monitor the drive parameters on a
Profinet network as well as peripheral Host and Device parameters. For a full list
of drive parameters, see the PowerFlex 750-Series AC Drives Programming
Manual, publication 750-PM001
, and for a list of option module Host and Device
Parameters, see Appendix
B.
Topic Page
About Acyclic Messaging 51
Profinet Acyclic Messaging 52
Example Messaging 52
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.
ATTENTION: Risk of equipment damage exists. If Acyclic Messages are
programmed to write parameter data to Nonvolatile Storage (NVS)
frequently, the NVS will quickly exceed its life cycle and cause the drive to
malfunction. Do not create a program that frequently uses Acyclic
Messages to write parameter data to NVS. Datalinks do not write to NVS
and should be used for frequently changed parameters.