Rockwell Automation 20-COMM-P Profibus Adapter - Manual (Page 71)

Chapter
6
Using Explicit Messaging
(Parameter Protocol)
Chapter 6 provides information and examples that explain how to use
Explicit Messaging to monitor and configure the adapter and connected
PowerFlex drive, as well as other peripherals.
Explicit Messaging is used to transfer data that does not require
continuous updates. With Explicit Messaging, you can configure and
monitor a slave device’s parameters on the PROFIBUS network.
Topic Page Topic Page
About Explicit Messaging 6-1 SLC Ladder Example - Station 1
Parameter Protocol 6-11
Running Explicit Messages 6-2 SLC Ladder Example - Station 2
Parameter Protocol 6-13
Parameter Protocol 6-3
!
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 Explicit Messages
are programmed to write parameter data to Non-Volatile 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
Explicit Messages to write parameter data to NVS. Datalinks do not
write to NVS and should be used for frequently changed parameters.
About Explicit Messaging
20COMM-UM006A-EN-P.book Page 1 Friday, September 28, 2001 10:43 AM