Rockwell Automation 56AMXN/B ControlLogix AutoMax Comm Module - Manual (Page 17)

AutoMax DCSNet/RE RIO Module Page 17
Publication number 56AMXN-UM002A-EN-P November 2002
will see the same input data as the ControlLogix with the owning Comm
Format, but it will have no configuration or output data tags.
More than one processor can use a Listen Only Comm Format to obtain
input data from the same 56AMXN, as long as an owner exists.
Remote Connections
If you are using a 56AMXN in a remote rack, for example a rack
connected to the rack that holds the processor using ControlNet or
Ethernet, it may be necessary to increase the RPI used to connect to the
56AMXN, as the intermediate network may not have sufficient
bandwidth to support the fastest RPIs, especially for the larger Comm
Formats (Master – 56 Drops, etc). In particular, 10 megabit Ethernet has
insufficient bandwidth to support the 56AMXN/B over a remote
connection.
Tags
Associated with each 56AMXN are several tags.
File Description
C Configuration tag
I Input data for broadcast connection
O Output tag for broadcast connection
I0 – I7 Input drop data tags
O0 – O7 Output drop data tags
Table 2 56AMXN Tags
The terms input and output are used from the point of view of the
56AMXN. If the 56AMXN is a DCS master, output data is data the
module sends to remote drops; input data is data received from remote
drops. If the 56AMXN is a DCS slave, output data is data it is sending to
the DCS master; input data is data it is receiving from the DCS master or
data other drops are sending to the master.
Configuration Tag
The contents of the configuration tag determine how the drop data maps
into the ControlLogix drop data tags.