Rockwell Automation 56AMXN/B ControlLogix AutoMax Comm Module - Manual (Page 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