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APPENDIX B – Frequently Asked Questions
Release 2.0
Page 267
APPENDIX B
Frequently Asked Questions
The appendix list some FAQs, and of course their answers.
Q What is the maximum limit of number of points?
For Machine Edition projects it is possible to create an application with up to 500 user defined points.
In theory each of these could be an array of 1024 elements totalling 512,000 addresses. For PLUS
edition there is a limit of 8000 user defined points, totalling over 8 million addresses if using arrays !!
In practice the communications medium, number of active points and their frequency of updates
determine the maximum limit.
See “What is the maximum limit of communication updates?”
Q What is the maximum limit of communication updates?
The charts below show the number of simultaneous reads per second depending on each PLC and
Network used. The maximum number of CX-Supervisor points depends on the update rates and
element sizes. For example, 1000 reads per second could be 1000 points of 1 element, with a 1
second update rate, or 200 array points with 5 elements with a 1 second update rate, or 20 array
points with 5 elements with a 100 millisecond update rate, or any combination of variations.
The figures should be self-explanatory, but its worth noting that Toolbus is better than twice as good
as SYSMAC WAY at the same baud rate, and depending on the PLC supports higher baud rates. This
is a very cheap way to improve performance.
Note 1: These figures assume best-case scenario, where data is in contiguous addresses. Lesser
performance will be achieved as memory areas are fragmented.
Note 2: These tests stopped at 1000 updates so actual limits are beyond this figure, except for CS1H
Ethernet and Controller Link Networks, which has been tested for 10,000 updates per second.
Summary of Contents for CX-SUPERVISOR - V2.0
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