Products

Performance

nv series Ethernet connection

Add array OPCItems as Advise from a OPC Client.
It is measured reading time from added OPCItems. Communication performance is defined as average time of ten times measurement.
This time means to read the value of a continuous area of the device.

PC specification

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OS	Windows 7 Professional 64bit OS
CPU	Intel(R) Core(TM) i5 CPU @3.20GHz
Memory	4.00GB
OPC Server	DxpSERVER OPC Server Ver5.1.0.1
OPC Client	OPCClient sample VcSampleOpc(C++)
Cable	100BASE-TX cross cable connecting directly

OPC Server setting

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Protocol Timer Tick	10msec
Timer Tick for Async Update Mode	10msec
Multi Access Mode	Enable
Multi Access for Snyc Asnyc	Disabled
Async Update Mode	Disabled

PLC setting

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CPU	S2PU72A
Communication unit	EN651A
Register	DT0-DT4096
Max scan time	12.4msec

Communication Performance

(sec)

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	1024	2048	4096	8192	16K	32K	64K	128K
Average	0.361	0.640	1.221	2.445	4.872	9.808	19.581	39.161
Max	0.421	0.688	1.280	2.499	4.941	9.929	19.710	39.370
Min	0.308	0.598	1.177	2.402	4.827	9.680	19.461	38.932

Results

In case of continuous data register(DT), it is possible to get max 4,000 points per sec.

Comment

*Graph displays average time of ten times measurement.(1point = 1word)
*In case of 16K points access , Read 16K points by using 2 devices.( 8K point per 1 device).
*The result only means our examination, it doesn't guarantee performance.

[Sep 2013]

Interface performance

Results of measurement of each interface(eg.sync /async /datachange event etc).(detail)