Rockwell-automation 1203-EN1 EtherNet/IP-to-SCANport Module User Manual Page 65

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Chapter 6
Using Explicit Messaging
Chapter 6 provides information and examples that explain how to use
Explicit Messaging to read/write parameters on a SCANport-based
drive. The examples used in this chapter are a continuation of the 1305
drive ladder example in Chapter 5
.
Refer to Chapter 5 for information about the I/O image, using Logic
Command/Status, Reference/Feedback, and Datalinks.
Explicit Messaging is used to transfer data that does not require
continuous updates. With Explicit Messaging, you can configure and
monitor a device’s parameters on the EtherNet/IP network.
Topic Page
About Explicit Messaging
6-1
Formatting Explicit Messages 6-2
Performing Explicit Messages 6-4
About the Example Explicit Messages 6-5
Example Get Attribute Single Message 6-6
Example Set Attribute Single Message 6-8
Example Get Attributes Scattered Message 6-10
Example Set Attributes Scattered Message 6-13
!
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, Inc. 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
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