Allen Bradley Plcs Solution Overview - Raco Catalyst Addendum To Owner's Manual

Table #2 illustrates the Modbus data file convention within the Catalyst. These Modbus Register
Addresses map to the Rockwell Automation controller's registers as per the Modbus Table File numbers, on
the Channel Configuration form within RSLogix, illustrated above.
Important:
It should be noted that Output Register (4xxxx) and Holding Register (5xxxx) data types use the
same data area at the Catalyst end. The Holding Register (5xxxxx) uses two consecutive 16-bit
addresses that are interpreted as a 32-bit floating point number (i.e. 5xxxx & 5xxxx+1). Not unlike
the Holding Register, the Output Register (4xxxx) also reserves two consecutive 16 bit words;
however the extended word is left blank.
Similarly, when addressing the input register (3xxxx), allow for two consecutive 16 bit words,
keeping in mind the word is reserved but not used. Hence, consecutive addressing of both Input
and Output Registers will appear as follows. For example, first Input Register address point
30001, second address point 30003, third address point 30005, etc.
7.

Allen Bradley PLCs Solution overview

This application note describes how to configure Catalyst EtherNet/IP with a Rockwell PLC using RSLogix
5000. Below you can find an overview of the system described in this document. Other nodes may be attached to
the network, but are not necessary.
The configuration is described in two steps.
1. At first the PLC and network configuration is explained.
2. Secondly the configuration of the IP-settings and the I/O data of the Catalyst EtherNet/IP are described.
The contents describe step by step how a configuration is done. This document assumes the reader is familiar
with industrial communication, EtherNet/IP networks.
Saved: 2014-06-18
Filename: Catalyst Ethernet Addendum 1 1 V1_5 released
RACO Manufacturing and
Engineering
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