Free Stuff - OPC Servers

Advosol

Free Tools

Advosol offers a number of simulation and sample servers, usually as part of a toolkit or component evaluation (requires registration). Supported specifications include DA 2, DA 3, HDA and XML-DA.

Beijer Electronics

OPC Server

Time-limited demo of DA 2.0 server. Many protocols are supported, and multiple protocols may be used simultaneously.

Cogent Real-Time Systems

OPC DataHub

Time-limited demo of DA 2 and DA 3 server and client combination that supports OPC tunnelling, aggregation, and bridging. Also offers TCP and DDE client and server, plus scripted read/write connections to ODBC databases and MATLAB.

Cyberlogic

MBX OPC Server
DHX OPC Server

Time-limited versions of servers for Modicon and Allen-Bradley, supporting DA 1.0a, 2.05a and 3.0, AE 1.1 and XML-DA 1.0. Free licensing for non-production use is available.

DSxP

OPC Simulator

Freeware simulator server for DA 2.0 and 1.0. Usefully shows list of clients and groups, plus an activity log.

Graybox

Gray Simulator

Free simulation server, compliant with all DA standards. May be redistributed with no limitations.

Graybox

Graybox OPC Server Toolkit Demo

Demo version of compliant DA server toolkit. Free download is restricted to 100 tags but otherwise unlimited.

Hexatec

Hexatec PC Data

A simple OPC server which allows monitoring of the PC's memory usage and disk space.

ICONICS

OPC Modbus Ethernet/Serial Servers

Demo servers for Modbus serial, Modbus Plus and TCP. Support Data Access 1 through 3, plus Alarms & Events 1.10.

ICONICS

OPC Simulator Server

A sample predefined browse space is supplied, but this may be modified and saved to different files as required. Supports Data Access 1 through 3, plus Alarms & Events 1.10.

INAT

OPC Servers

Evaluation versions of OPC servers for various protocols. Run for 72 hours after every restart.

IOServer

IOServer

Evaluation version of a combined OPC server and client package, including several I/O drivers. Very flexible, but user interface is sometimes confusing. Includes support for a proprietary protocol, offering a subset of OPC Data Access functionality, which uses XML data packets sent over HTTP.

Kassl

dOPC Clone

Trial version of a revolutionary product which allows full emulation of other DA servers with no need for an underlying communications network. Invaluable for system development, configuration, and demonstration. dOPC Clone is DA 2.05a compliant.

Kepware

KEPServerEX (Super Server Pack)

Time-limited demo download of leading DA server bundle, incorporating over 80 communications drivers. Supports DDE and SuiteLink for legacy applications. Also includes a useful client program (see clients). Now DA 3.0 compliant.

MatrikonOPC

OPC Simulation Server

Widely used Data Access server, compliant with DA 2.05, DA 3.00 and AE specifications, and also with HDA support.

NetListener

OPC-NetListener

Trial version of a DA server which monitors network status using either ICMP (Ping) or SNMP.

OPCTechs

Demo OPC Server

Two-hour trial version of an OPC server supporting DA 2, DA 3, AE and XML-DA. A wide range of protocols is offered.

Prosys

Prosys OPC Simulation Server

Fully compliant DA 2.05a server with source, demonstrating capabilities of the Prosys Sentrol rapid development framework.

Softing

OPC Demo Server

Free demo server. Version 4.10 adds XML-DA to the existing DA and AE support. The XML-DA server may run standalone, or integrated with Apache or IIS.

Softing

OPC Servers

Serveral trial downloads are available, supporting different fieldbus protocols.

Software Toolbox

OmniServer

Demo version of a product which allows the user to define his/her own serial or TCP/IP protocol without programming. Also supports DDE for legacy purposes. Requires restart after 60 minutes. Now certified DA 2.05a compliant.

Software Toolbox

TOP Server

Rebadged version of Kepware's KEPServerEX (above). Now DA 3.0 compliant.

SST

OPC Simulation server and GUI client

In-process simulation server, supplied as an aid to compliance testing of OPC clients. Now has improved OPC Data Access 2 support and includes the updated proxy/stub DLL, as well as a simple client program (see clients).

Takebishi

OPC Server Demos

Restricted versions of various OPC servers, some now with DA 3 support.

WinTECH Software

Various servers

OPCSvr.zip is a simulation server supporting Data Access 2. It has some useful diagnostic aids: the user may control the profiles of the simulated data points, and all OPC interface calls are displayed in a logging window. Also available is a demo server for Historical Data Access.