Rockwell Automation 1757-SWKIT5000 ProcessLogix R500.1 Installation and Upgrade Guide - Manual (Page 251)

Publication 1757-IN500A-EN-P - September 2002
Performance and Capacity Specifications 11-11
Controller and
Communications Capacity
and Performance
Control Network Capacity
System Communications Load Philosophy and Guidelines
The ProcessLogix System is designed with certain patterns of communications
in mind. Being aware of the intended traffic flows will help the application
engineers insure that the application realizes the highest usage from the
system’s architectural capabilities.
The basic concept is shown in the following hierarchical diagram. It shows
four levels of networking: Plant Information, Supervisory, I/O, and Device. It
also includes four levels of networking nodes: Application stations (like
Table 11.J Process Control Network Specifications
Supervisory Process Control Network
Network Media Ethernet ControlNet
Supervisory Networks per ProcessLogix Server
(1 PCIC card per Server)
Mixed Supervisory ControlNet & Ethernet on the same Server is
not supported.
1 non-redundant network
serviced by 1 redundant or
non-redundant Server 1 redundant or non-redundant
network serviced by 1 redundant
or non-redundant Server
Total ControlNet connections Limit
(1) N/A 127
Allowable Combinations of Controllers * per Server Up to 10 non-redundant only Up to 10 redundant or
non-redundant in any
combination
Maximum Number of Nodes allowed including Controllers,
Servers and FIM-only chassis. 12
• Only qualified for redundant
Servers +10 non-redundant
controllers
• FIMs are not supported on a
Supervisory Ethernet system
in any configuration
24
Data Transmission Rate 10 Mbits/sec 5 Mbit/sec
Media Redundancy Non-redundant only Single cable or redundant media
operation supported.
Controller Definitions including PLCs
Multiple 1757-PLX52s per chassis are NOT supported. However, a
non-redundant 1757-PLX52 can reside in the same chassis as a
Logix 5550.
PLCs only count as controllers when SCADA connections are
defined against the PLC. Non-Redundant:
• 1 1757-PLX52
• 1 Logix5550
• 1 PLC5/C or E
• 1 SLC (Ethernet only)
Redundant:
• 2 1757-PLX52s in a Chassis
Pair with 2 1757-SRMs
• 2 1756-5555s in a chassis pair
with 2 1757-SRMs
(1)
The CPM and FIM use 1 PCIC connection from the Server regardless of whether they reside on a Supervisory or I/O ControlNet. PLCs should be limited to 2 connections if
configured as SCADA controllers via RSLinx.