Rockwell-automation 56AMXN/B ControlLogix AutoMax Comm Module Manual de usuario descargar pdf (Pagina 45)

AutoMax DCSNet/RE RIO Module Page 45

Publication number 56AMXN-UM002A-EN-P November 2002

Length (bytes)

Destination Destination tag name

Table 13 Get Attribute List Example

In the source tag, an array of at least 4 integers, we would enter:

3 (number of attributes)

1 (first attribute)

4 (second attribute)

7 (third attribute)

The reply written to the destination tag would consist of:

3 (number of attributes)

1 (status of first attribute, drop 1)

32 integers of data for drop 1

1 (status of second attribute, drop 4)

32 integers of data for drop 4

1 (status of third attribute, drop 7)

32 integers of data for drop 7

Set Attribute List, Service Code 4

Set Attribute List is a standard ControlNet service that lets you read write

the data for more than one attribute (drop) with a single message. The

56AMXN also supports a custom service, Write Multiple Drops (see

page 50) that performs the same function but which has a parameter

format that makes it easier to locate DCS network data.

We recommend that applications use Write Multiple Drops rather than

Set Attribute List.

To use Set Attribute List to write the instance level attributes for more

than one attribute (drop), enter the following parameters in the MSG

instruction tags:

Message

Type

CIP generic

Service Type Custom

Service Code 4

Class (hex) C4h

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 71 72

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Rockwell-automation 56AMXN/B ControlLogix AutoMax Comm Module Manual de usuario Pagina 45