Rockwell-automation 22-COMM-E EtherNet/IP Adapter Manual de usuario descargar pdf (Pagina 56)

6-6 Using Explicit Messaging

A Get Attribute Single message reads a single attribute value. In this

example, we read the value of a parameter in a PowerFlex 40 drive.

Example Message Format

Figure 6.4 Message Format for a Get Attribute Single Message

The following table identifies key settings for the message format:

Example Get Attribute Single Message

Configuration Value Description Refer to . . .

Service Type

(1)

Service Code

(1)

Class

Instance

Attribute

Destination

(1)

The default setting for Service Type is “Custom,” which enables you to enter a Service

Code that is not available from the Service Type pulldown menu. When you select a

Service Type other than “Custom” from the pulldown menu, an appropriate Hex. value

is automatically assigned to the Service Code box which grays out (unavailable).

Get Attribute Single

e (Hex.)

f (Hex.)

39 (Dec.)

1 (Hex.)

ParameterReadValue

Read parameter data

Get_Attribute_Single

DSI Parameter Object

Parameter 39 - [Accel Time 1]

Parameter Value

Controller tag for response data

C-27

C-12

C-24

C-25

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Rockwell-automation 22-COMM-E EtherNet/IP Adapter Manual de usuario Pagina 56