OpenSCADA Development Blog

Good news, everyone! Utgard 0.1.8 is out which features a new version of j-Interop that solves the array writing issues that we had in the last releases. Also the we have a new interface mapped: the IOPCServerList (aka OPCEnum). So it is now possible to browse for OPC services using Utgard. Also there were some enhancements in the “lib” module which should ease the access using the browser interfaces.

In the last months there were also a lot of tests made with different OPC Server (Kepware, Moeller, rslinx) and most of them worked perfectly. Thanks to all testers and of course thanks to Vikram for solving the array issue in j-Interop!!

Download links and more information about the release can be found on the release page: UtgardRelease018.

After lots of test and several minor fixes we finally have a release 0.1.6 of the OPC library. The most notable changes are a new version of J-Interop (thanks to Vikram!) which solves some issues with the JIVariant encoding/decoding and some connection issues. Also the helper library “openscada_opc_lib” has some new functionality that helps you a little bit.

For more information and the download link see the release page.

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Version 0.1.5 of project Utgard (the OPC interface project) has been release. The major change is a new version of the library j-interop (thanks to Vikram) which fixes some issues in the DCOM protocol handling. Together with some minor bug fixes this gives a new version which can now handle async IO 2.0 connections with Matrikon and Softing OPC servers and support browsing with much larger batch sizes.

More information and links for downloading can be found on the release page UtgardRelease015.

Quickly after the 0.1.2 release we where able to make the first release which includes the Async IO 2.0 interface. Many thanks to Vikram Roopchand for making this possible! For details and downloads see the wiki (UtgardProject - UtgardRelease013) as always

While working on the OpenSCADA OPC interface module project Utgard received several enhancements in the area of connection and error handling. Connection states, error conditions are reported using listeners, and the sync access reader supports a server reconnect now. Although some issues still remain open, it is worth a micro-release (Release 0.1.2).

Also the work on the OpenSCADA OPC interface module make good progress. Initial communication is established using the libraries provided by project Utgard. OpenSCADA now has access to the OPC data sources. Due to the fact that some issues are still unresolved and since the project is not integrated into the nightly build process up to now there is only the following screenshot previewing what will come in 0.6.0 of project Atlantis.

The screenshot shows the OpenSCADA RCP Application which is connected to the OpenSCADA OPC interface module. The interface module is connected to an OPC simulation server running on Windows. OpenSCADA Client and Server are both running on Linux (Ubuntu 6.10).

After digging some weeks through DCOM interface mapping we finally have a working library which can be used to implement OPC client applications. Although this is not really challenging the interesting part of this is that it is a 100% Java solution (no native DLL or JNI modules are required) and it is a 100% open source solution!

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