Rockwell Automation 1757-SWKIT4000 ProcessLogix R400.0 Installation and Upgrade Guide - Manual (Page 279)

Publication 1757-IN040B-EN-P - March 2002
Performance and Capacity Specifications 11-27
(1)
5 ms CEE not supported on BETA-PLX52
(2)
Supervisory Ethernet LAN systems only guarantee a Pull/Get Request Rate of 500 msec or greater. Faster Pull/Get rates can be co nfigured,
however, data arrival at the configured rate cannot be guaranteed for rates faster than 500 msec.
Table 11.T 1757-PLX52 Processing Resources
1757-PLX52 Processing Resources
Definitions:
PU = Processing Unit. The PU represents a platform independent amount of processing resources
(time) required to complete a predefined amount of computational (control) work.
Maximum Cycle Loading: Over an cycle (0-39), the “Average CPU Used” (CPUCYCLEAVG) statistic
is not to exceed the stated maximums.
Minimum Reserved CPU to be Maintained During
Runtime (CPUFREEAVG) 20%
1757-PLX52 Configuration PU Maximum Maximum Cycle
Loading
50 ms CEE – Non-Redundant Configuration 3600 PU/sec 60%
50 ms CEE – Redundant Configuration 1600 PU/sec 60%
5 ms CEE – (Non-Redundant only) 2400 PU/sec 40%
Table 11.U 1757-PLX52 Memory Resources and Block Configuration
1757-PLX52 Memory Resources and Block Configuration
Definition: MU = Memory Unit = 1 Kbyte = 1024 bytes
Maximum Available 1757-PLX52 Memory Resources 4000 MU
Maximum Total Number of CMs, SCMs and IOMs Configurable
per 1757-PLX52 1000
Maximum Number of Component Blocks per CM 40
Maximum Total Number of Steps and Transitions
(in all handlers) per SCM 160
(80 Step/Transition pairs)