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OPC (OLE for Process Control) Server for Windows. Interface to multiple protocols through a single OPC Server.

This software allows OPC clients such as HMI (Human Machine Interface) and SCADA (Supervisory Control and Data Acquisition) systems to exchange plant floor data with PLC (Programmable Logic Controllers).

images/opc-diagram.gif

Software Features

✔ Supports TCP/IP, UDP/IP, Serial (Direct, Telephone Modem or Radio), and File I/O.
✔ Master and Slave protocol implementation.
✔ Unlimited level of multi-path (serial / TCP/IP) device redundancy.
✔ Four levels of IP Address redundancy.
✔ No need to change OPC Server if you change your hardware or HMI/SCADA software.
✔ One OPC Server can run all supported protocols and link drivers (Ethernet / Serial) simultaneously.
✔ Full-time line data analyzer and logging. Great for commissioning or tuning system on site.
✔ Modeless operation. No separate configuration and run mode.
✔ OPC Gateway to convert time-stamped data between OPC Servers.
✔ OPC Explorer with data simulator for interoperability testing with any OPC Server.
✔ Create your tree-structured tag names.
✔ XML Server for serving OPC data to web pages.
✔ Create your own OPC Server for ASCII devices.
✔ Link level end-to-end forward error correction, data compression, and encryption.

Download Software

IOServer is available via the following downloads.

All supported drivers driver24.exe (20th June 2020).

Documentation (in HTML format) iosdoc.exe (24th September 2025)

Beta drivers beta2533.exe (28th October 2025)

IOServer with OPC Gateway 2 (29th August 2024)

From beta2527.exe onward, configuring the DNP3 driver in "SlavePlus" mode allows for multiple masters. The "Slave" mode will continue to function as before, meaning that events will be deleted as soon as they are extracted by any DNP master. Users of versions beta2515.exe to beta2526.exe should upgrade to the latest version. This update addresses a memory leak issue that could cause the IOServer to run out of memory and crash when events with timestamps weeks into the future are sent to the DNP3 slave.

Please read the FAQ first on how to use IOServer

Free Support

We provide free email support to all users. Users must read the FAQ first. Please email us if you need support with using IOServer, it does not matter how long ago or if you have purchased IOServer. We aim to fix all reported problems within 24 hours.

© Copyright IOServer Pty Ltd. All rights reserved.
✉+61 2 9805 0356 (Australia)

Last updated: Tue, 28 Oct 2025 10:29:42 GMT