Interface Performance

Test setting

This test involves synchronous communication from an OPC client.
The time from when a request is made from the OPC client to when the result is returned from the OPC server was measured.
The communication speed was calculated by averaging 10 measurements.
The following shows the measurement results of synchronous reading and writing of 1 to 128k points for both non-array tags and array tags.

Communication protocol

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OPC Server - Client	OPC UA
OPC Server - PLC	SLMP

PC specification

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OS	Windows 10 Pro　64bit OS
CPU	12th Gen Intel(R) Core(TM) i7-1260P 2.10 GHz
Memory	32.0 GB
OPC Server	DeviceXPlorer OPC Server Ver7.3.0.1
Cable	100BASE-TX straight cable, direct connection

OPC Server setting

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

PLC setting

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CPU	R04CPU (using built-in Ethernet port)
Register	D0 - D16383
Max scan time	0.264msec

Measurement results for non-array tags

Communication Performance

≪Average≫

(sec)

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	1	1024	2048	4096	8192	16K	32K	64K	128K
SyncRead	0.005	0.015	0.026	0.047	0.095	0.174	0.389	0.830	1.720
SyncWrite	0.007	0.069	0.132	0.265	0.509	1.043	2.033	4.273	8.779

[Measured in May 2024]

Measurement results for array tags

Communication Performance

≪Average≫

(sec)

	1	1024	2048	4096	8192	16K	32K	64K	128K
SyncRead	0.004	0.009	0.015	0.029	0.045	0.094	0.180	0.355	0.711
SyncWrite	0.004	0.008	0.017	0.023	0.044	0.088	0.173	0.344	0.695

[Measured in May 2024]