Rockwell Automation 56AMXN/B ControlLogix AutoMax Comm Module - Manual (Page 47)

AutoMax DCSNet/RE RIO Module Page 47
Publication number 56AMXN-UM002A-EN-P November 2002
For instance 2, the size must be 16 (8 words). The command writes to
the broadcast registers (32-39). Normally you would do this only as a
DCS master.
The maximum message size limits the number of attributes you can write
in a single message to 7.
DCS Raw Write, Service Code 32h
The DCS raw write command can be used to write a block of data to the
DCS data area on the module. You tell it the starting offset and the data
length and it writes the data. This is a very powerful command, use it
carefully!
Enter the following parameters in the MSG instruction tags:
Message
Type CIP generic
Service Type Custom
Service Code 32h
Class (hex) C4h
Instance 1
Attribute (hex) Leave blank
Source
Element Enter source tag
Source
Length (bytes) 2 + length of data in words * 2, max 480 (max data
length = 239)
Destination Enter destination tag name, not used but must be
entered
Table 16 DCS Data Object DCS Raw Write Parameters
In the source tag
First word offset in words = drop * 64 + register, range is 0 to 55 *
64 + 63 = 3583
Remaining
words Data[…]
The module checks that the offset in in range and that the combination of
offset and length is in range. If this is not true, it returns an error.