Application directories

This application uses various directories to store relevant information, e.g. configuration or certificate files.

Installation directory

The base installation directory of the application is always relative to the TwinCAT installation directory on all operating systems.

%TcInstallDir%\Functions\TF6100-OPC-UA

The application is then installed in the following directory below this directory. A distinction is made here according to platform (x86/x64).

%TcInstallDir%\Functions\TF6100-OPC-UA\Win32\Server
%TcInstallDir%\Functions\TF6100-OPC-UA\Win64\Server

Base directory for PKI infrastructure

Certificate files, which are used to establish a secure communication connection, are stored in the following directory on all operating systems:

%TcInstallDir%\Functions\TF6100-OPC-UA\Win32\Server\PKI
%TcInstallDir%\Functions\TF6100-OPC-UA\Win64\Server\PKI

Directory for trusted certificates

Client certificates in this directory are declared as "trusted". This path is identical on all operating systems.

%TcInstallDir%\Functions\TF6100-OPC-UA\Win32\Server\PKI\CA\trusted
%TcInstallDir%\Functions\TF6100-OPC-UA\Win64\Server\PKI\CA\trusted

Directory for rejected certificates

Client certificates in this directory are declared as "rejected". This path is identical on all operating systems.

%TcInstallDir%\Functions\TF6100-OPC-UA\Win32\Server\PKI\CA\rejected
%TcInstallDir%\Functions\TF6100-OPC-UA\Win64\Server\PKI\CA\rejected

Directory for the server certificate

The directories for the server certificate are defined as follows, whereby a distinction is made between the directory for the public key ("certs") and private key ("private").

%TcInstallDir%\Functions\TF6100-OPC-UA\Win32\Server\PKI\CA\own\certs
%TcInstallDir%\Functions\TF6100-OPC-UA\Win64\Server\PKI\CA\own\private

Log files

Log files are stored in the following directory. There is a distinction according to the operating system.

%TcInstallDir%\Functions\TF6100-OPC-UA\Win32\Server (Windows)
%TcInstallDir%\Functions\TF6100-OPC-UA\Win64\Server (Windows)
/var/log/TF6100-OPC-UA-Server (TwinCAT/BSD)

Configuration files

The TwinCAT OPC UA Server uses various configuration files to configure the individual functions, which are defined as listed in the table below. All configuration files are located in the installation directory of the server (see above) and are usually configured via the TwinCAT OPC UA Configurator.

File	Description
TcUaAcConfig.xml	Configuration file for the Alarms & Conditions (A&C) functionality of the server. The nodes configured for A&C are saved in this file.
TcUaDaConfig.xml	Configuration file for the Data Access (DA) functionality of the server. The communication connections with the lower-level ADS devices are configured in this file.
TcUaGdsClientConfig.xml	Configuration file for the Global Discovery Server configuration. The connection to a GDS is configured in this file.
TcUaHaConfig.xml	Configuration file for the Historical Access (HA) configuration of the server. This file stores both the data memories used for HA and the nodes configured for this purpose.
TcUaNodesetConfig.xml	Configuration file for the Nodeset import of the server. The Nodesets to be imported and their link to an ADS device are defined in this file.
TcUaSecurityConfig.xml	Configuration file for users, groups and Access Control Lists (ACL) as part of the definition of access rights and authentication mechanisms.
TcUaServerConfig.xml	Configuration file for various parameters of the server, e.g. configuration of the endpoints, Logging, Reverse Connect.