Rockwell-automation 25-COMM-P PowerFlex PROFIBUS DPV1 Adapter Manual de usuario descargar pdf (Pagina 50)

50 Rockwell Automation Publication 520COM-UM004A-EN-E - November 2013

Chapter 6 Using Acyclic Messaging

Class 1 Acyclic Read for Host Parameter 1 [Output Freq]

When the message response successfully returns, the data for the Output

Frequency parameter will be placed in the tags

MVI69PDPMV1.Mailbox.Class1AcyclicRead.In.Data[] byte array. In the

controller program, the return message data may be copied to a locally configured

program tag, and converted by correctly assigning the data type for the Local tag

to which the data returned from the read requests matches. In this Host

parameter 1 [Output Freq] example, the local tag’s data type should be an

integer.

Class 1 Acyclic Read response data can be viewed as shown in Class 1 Acyclic

Read Response Data for Host Parameter 1 [Output Freq] on page 51.

Change value of tag to “1” to send

Class 1 Acyclic Read Command.

Copy or insert values for parameter read request:

- Parameter Slot Number

- Slave Node Address

- Length of Data (Bytes)

- Parameter Index

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Rockwell-automation 25-COMM-P PowerFlex PROFIBUS DPV1 Adapter Manual de usuario Pagina 50