Rockwell Automation 56AMXN/B ControlLogix AutoMax Comm Module - Manual (Page 48)

Page 48 AutoMax DCSNet /RE RIO Module
Publication number 56AMXN-UM002A-EN-P November 2002
DCS Raw Read, Service Code 33h
The DCS raw read command can be used to read a block of data from the
DCS data area on the module. You tell it the starting offset and the data
length and it reads the data.
Enter the following parameters in the MSG instruction tags:
Message
Type CIP generic
Service Type Custom
Service Code 33h
Class (hex) C4h
Instance 1
Attribute (hex) Leave blank
Source
Element Enter source tag name
Source
Length (bytes) 4 (offset + length)
Destination Enter destination tag name, must be large enough to
hold the data
Table 17 DCS Data Object DCS Raw Read Parameters
In the source tag
First word offset in words = drop * 64 + register, range is 0 to 55 *
64 + 63 = 3583
Second word Length in words, 1 to 230
Read Multiple Drops, Service Code 37h
This command is similar in purpose to Get Attribute List, except that the
layout of the data is more intuitive and makes it easier to locate the data
for a specific drop and register. The format for Get Attribute List is set
by the ControlNet specification and can’t be changed.
Read Multiple Drops does not support drop 0.
Enter the following parameters in the MSG instruction tags: