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Chapter 1. Introduction
1.8 PROFINET Operation Overview
An RX3i Genius Communications Gateway (GCG001) uses PROFINET communications for data exchange with
the PLC. As noted above, the data rate must be 100Mbps full-duplex or faster. The same network may be used
for basic Ethernet communications, but use of a separate Ethernet network and RX3i Ethernet interface is
recommended.
PROFINET Communications
Communications on an RX3i PROFINET network use the standard PROFINET communications described in this
section. Note, however, that the Genius Gateway GCG001 is constrained to work only with GE PROFINET PLC
products.
Application Relationships
Before a PROFINET IO-Controller can exchange data with a PROFINET IO-Device such as the GCG001, an
Application Relationship (connection) must be established between the devices. The PROFINET IO-Controller
automatically sets up the correct number and types of Application Relationship and Communication
Relationship channels (see below) based on its PME configuration. Usually, only one Application Relationship is
established per IO-Device.
Communication Relationships within an Application Relationship
Within each Application Relationship, the PROFINET IO-Controller establishes the following types of
Communication Relationships (CRs):
Record Data CRs – always the first to be established within an Application Relationship. Record Data
Communication Relationships are used for non-real-time transfers of data records such as startup parameter
data, diagnostics data, identification data, and configuration data.
IO CRs – used for the real-time, cyclic transfer of IO data
Alarm CR – used for real-time, acyclic transfer of alarms and events
The following illustration represents an Application Relationship between an RX3i PROFINET Controller and an
RX3i Genius Gateway GCG001.
RX3i with PROFINET Controller (PNC)
1
OK
2
LAN
3
STAT US
4
CONN
PNS001
TO INSTALL,
TORQUE TO
6 IN -LB.
ACTIVE
USB
IP ADDRESS
MAC ADDRESS
PORTS
FRONT
3 4
1 2
IO DEVICE
Figure 5: Application Relationships between PROFINET Controller & Genius Gateway
10
Application Relationship
Record Data Communication Relationship
I/O Data Communication Relationship
Alarm Communication Relationship
PACSystems RX3i Genius Communications Gateway
Genius Gateway (GCG001)
GFK-2892F
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