OPC (formerly OLE for Process Control) is an industry standard created in collaboration with a number of worldwide leading automation hardware and software manufacturers. OPC allows software components such as software connectors to be combined and enables these components to intercommunicate without special adaptions. In order to offer you, as a Pascal developer, the opportunity to work with the OPC standard in the familiar Embarcadero (Codegear, Borland) Delphi and Lazarus environment, we've developed a OPC software toolkit (SDK, Framework, Toolbox) supporting the most common interfaces and protocols of OPC (Data Access DA, XML DA, Alarms & Events AE and Historical Data Access HDA).

dOPC main features:

works with Delphi 6, 7, 2005, 2006, 2007, 2009, 2010, XE, XE2, XE3, XE4, XE5, XE6, XE7, XE8, Delphi 10 Seattle
works with Lazarus (http://www.lazarus.freepascal.org)
quick and easy development of OPC DA, XML DA, HDA and AE clients
100% VCL / FCL Library & FireMonkey Framework compatible
100% written in Object Pascal
delivered with full source code
more than 30 example programs with full source code
beside the OPC core components no additional DLL or ActiveX controls needed
comprehensive help file, for online versionclick here
rapid application deployment
Unicode support (RAD Studio 2009 or newer)
fast GUI development (no source code required)
multiple and remote OPC server connections supported
creation of 32 and 64 bit OPC high performance clients
no runtime fees, royalty-free runtime distribution
no limit on the number of applications developed
designed for: Windows 8,7, Vista, XP, 2K, NT, 98, Me
creation of OPC XML DA clients for Android, Mac OS (OS X) and iPhone (iOS) (XE5 or higher)

OPC Specifications supported by dOPC:

OPC Data Access DA 1.x, 2.x and 3.x
OPC XML Data Access XML DA 1.x
OPC Alarm & Events AE 1.x
OPC Historical Data Access HDA 1.x (on request only for registered users)

Pascal IDE's supported by dOPC:

Embarcadero Delphi and RAD Studio XE2, XE3, XE4, XE5, XE6, XE7, XE8 and Delphi 10 Seattle (Windows 32 and 64 bit)
Lazarus (ver 1.0.10) with Free Pascal (FPC 2.6.2) or higher (Windows 32 and 64 Bit)
Embarcadero Delphi and RAD Studio 2010, XE
CodeGear Delphi and RAD Studio 2009
CodeGear Delphi and RAD Studio 2007 (only Delphi Win32)
Borland Delphi 6,7, 2005 and 2006
Turbo Delphi 2006

Our powerful dOPC Toolkit allows you to build OPC client applications with just a few mouse clicks. E.g. dOPC includes a GUI component that allows you to bind OPC item values directly to properties of visual components, such as labels or edit boxes.

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