Omron CX-SUPERVISOR - V2.0, User Manual

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APPENDIX B – Frequently Asked Questions OMRON
Page 274 Release 2.0
Q How does upgrading CX-Server affect communications performance?
The graphs below should show that this does not have a significant impact. The graphs show:
•
Time to perform instantaneous read and writes are slightly slower on average, although this
is in the order of a few milliseconds so is not ordinarily visible.
•
Maximum number of Subscription points remains the same across all versions. This is
confirmed with a variety of protocols
See -> "How does my PC specification affect communications performance?"
See -> "What is the maximum number of communication updates?"
0.00
20.00
40.00
60.00
80.00
100.00
120.00
CX-Server 1.6.3 CX-Server 1.7 CX-Server 2.2
%
(
of
1
.6
.3
p
er
for
m
a
nc
e
)
Subscription (Ethernet)
Subscription (Sysmac Way) (1)
Subscription (Sysmac Way) (2)
Read
Write
Q How does my PC specification affect communications performance?
The graphs below show that processor speed has a significant impact on performance, especially for
large systems with high quantities of On Interval Subscription points. The graphs show:
•
Upgrading from a 450Mhz system to a 2.4Ghz can quadruple the maximum number of
Subscriptions that can be processed
See -> "What is the maximum number of communication updates?"
•
Read, Write times and performance under load improve with processor speed
•
CX-Server DI 2.2 performs in very similar manner to previous versions and better on a mid
spec machine.