YASUKAWA MP Performance

MP2000 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

OS:
    Windows 7 Professional  32bit OS
CPU：
    Intel(R) Core(TM) i7 CPU 860 @2.80GHz
Memory：3.00GB
OPC Server：
    DeviceXPlorer OPC Server Ver4.2.0.2
OPC Client：
    OPCClient sample VcSampleOpc(C++)
Cable：
    100BASE-TX cross cable connecting directly

OPC Server setting

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

CPU:MP2300
Communication unit:218IF-01
Register:MW0-MW32767
Max scan time:1msec

Communication Performance

(sec)

	1024	2048	4096	8192	16K	32K	64K	128K
Average	0.116	0.187	0.329	0.662	1.239	2.451	4.090	9.792
Max	0.125	0.218	0.343	0.702	1.388	2.543	4.977	9.890
Min	0.094	0.171	0.312	0.640	1.115	2.356	4.836	9.626

Results

In case of continuous Holding Register(MW), it is possible to get max 12,000 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.

[Jun 2010]