SHARP SATELLITE Performance

JW series Ethernet communication

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:JW-321CU
Communication unit:JW-25TCM
Register:D009000-D79777,D109000-D179777(total 16k)
Max scan time:7msec

Communication Performance

(sec)

	1024	2048	4096	8192	16K	32K	64K	128K
Average	0.031	0.118	0.124	0.249	0.497	1.011	2.041	4.097
Max	0.031	0.620	0.124	0.249	0.499	1.014	2.044	4.103
Min	0.031	0.062	0.124	0.249	0.483	0.999	2.028	4.072

Results

In case of continuous D register, it is possible to get max 32,000 points per sec.

Comment

*Graph displays average time of ten times measurement.(1point = 1word)
*In case of 32K points access , Read 32K points by using 2 devices.( 16K point per 1 device).
*The result only means our examination, it doesn't guarantee performance.

[Jun 2010]