Compression; Basic System: One Rx3I Cpu And One Profinet Controller Using A Single Port - Emerson PACSystems RX3i User Manual

RSTI-EP PROFINET I/O Controller User Manual
GFK-2571R
Components of the RX3i PROFINET network consist of a PACSystems RX3i PROFINET
Controller communicating with IO Devices on the PROFINET bus.
The PROFINET Controller may be an embedded PROFINET Controller (CPL410, CPE400 or
CPE330 or CPE100/CPE115) or a rack-mounted PNC001 module located in the RX3i CPU
rack. For rack-mounted PNC001 units, the main RX3i rack can include up to four PNC001
modules, each communicating with its own high-speed network.
IO Devices on the network can consist of the I/O modules installed in a rack, each containing
a PROFINET Scanner (PNS) as its head-end, such as the Emerson products listed above. The
network may also include a wide range of third-party IO Devices, such as pressure gauges
and motor actuators, that are connected directly to the PROFINET network.
1.6.1

Compression

Due to the smaller memory capacities of CPE302, CPE305 and CPE310, these CPUs require
"Compression" when attaching RX3i PNS or CEP to their PROFINET configuration.
• CPE302: User MUST use Target PLC parameter with "Compression" set to HIGH.
• CPE305: User MUST use Target PLC parameter with "Compression" set to MODERATE.
• CPE310: User can use Target PLC parameter "Compression" set to NORMAL.
• All other CPUs: User can choose to use "Compression" or not.
1.6.2 Basic System: One RX3i CPU and One PROFINET
Controller using a single port
Figure 6 shows a basic system with one PACSystems RX3i CPU node having one PROFINET
Controller, and one PROFINET network with three VersaMax Scanners and one third-party
IO-Device. Up to 128 IO-Devices can be installed on an RX3i PROFINET network. The
VersaMax PNS and many types of third-party IO-Devices interface multiple devices such as
I/O modules to the PROFINET network.
Figure 6: RX3i System with one PROFINET Controller and one PROFINET LAN
Introduction
Section 1
May 2021
15