APPENDIX B – Frequently Asked Questions OMRON
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SYSMAC-WAY(9600) Toolbus(9600)
Max. Num. of Reads per Second
See -> "How does the Operating System affect performance?"
See -> "What is the maximum limit of number of points?"
See also Chapter 16 Best Practices, Performance and Chapter 16 Best Practices, Points
Q How can I see if the communication network is overloaded?
Use “CX-Supervisor Performance Monitor Tool” to see if the network is overloaded
This tool is available in the CX-Supervisor run-time by right clicking and selecting Performance… (
if security privileges allow). It can be used to see how much of the available bandwidth is in use.
You can also see how many points are waiting to be processed and the latency of actual
communications. To improve responsiveness try to reduce the bandwidth used, the latency and the
number of active messages.
Note that performance begins to reduce well before 100% saturation is achieved. For example it is
rare to achieve more than 70-80% for a serial connection. This is analogous to a motorway where
cars slow down long before they are touching bumpers, and might only achieve a maximum of 50%
capacity (i.e. each car has a car length space behind it).
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