Installation and Upgrade Guide User guide

Publication 1757-IN032B-EN-P - April 2001
Performance and Capacity Specifications 7-17
1757-PLX52 Resources
Table 7.U 1757-PLX52 Configuration Options
1757-PLX52 Configuration Options
1757-PLX52 Module Slot Width 2 slots
Base Execution Periods Supported
(different personalities required)
50 ms, 5 ms*
Note:
5 ms CEE not supported on
BETA-PLX52
50 ms CEE 5 ms CEE
Controller Redundancy Supported Yes No
Remote I/O Supported Yes No
I/O Module Execution Period 50 ms 5 ms
Configurable Values for CM/SCM Execution Periods 50, 100, 200, 500,
1000, 2000 ms
5, 10, 20, 50, 100,
200 ms
Configurable Values of Peer Update Rates (period).
• Defines the period at which data is updated for all
‘pull/get’ requests for peer data required by all
blocks within a CEE.
*Supervisory Ethernet LAN systems only guarantee a
Pull/Get Request Rate of 500 msec or greater. Faster
Pull/Get rates can be configured, however, data arrival
at the configured rate cannot be guaranteed for rates
faster than 500 msec.
100, 200, 500*,
1000* ms
10, 20, 50, 100,
200, 500*, 1000*
ms
Table 7.V 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%