If you are repairing or removing the OPC Foundation Core Components, make sure that you do not have any OPC Toolbox objects in memory. Use the opcreset function to clear all objects from memory.

opcreset;

Run opcregister with the action you would like to perform. If you do not supply an option, the function assumes that you want to install the components. Otherwise, use 'repair' to repair an installation (reinstall the files), or 'remove' to remove the components.

opcregister('install')

You will be prompted to type Yes to confirm the action you want to perform. You must type Yes exactly as shown, without any quotes. This confirmation question is used to ensure that you acknowledge the action that is about to take place.

The OPC Foundation Core Components will be installed, repaired, or removed from your system.

If you receive a warning about having to reboot your computer, you must quit MATLAB and restart your computer for the changes to take effect.

Create a new local user. (You can also create a domain user if the server and client machines are part of the same domain.) The name used in these instructions is opc (displayed as OPC Server in dialogs boxes), but you can choose any name, as long as you remain consistent throughout these instructions.

Select Start > Control Panel. Double-click Administrative Tools and then double-click Component Services. The Component Services dialog appears.

Browse to Component Services > Computers > My Computer > DCOM Config.

Locate your OPC server in the DCOM Config list. The example below shows the Matrikon™ OPC Server for Simulation.

Right-click the OPC server object, and choose Properties.

In the General tab, ensure that the Authentication Level is set to Default or to Connect.

In the Security tab, choose Customize for the Launch and Activation Permissions, then click Edit. Ensure that the opc user is granted local Launch and Activation permissions.

Click OK to dismiss the Local Launch and Activation Permissions dialog box.

In the Security tab, choose Customize for the Access Permissions, then click Edit. Ensure that the opc user is granted Local Access permissions.

Click OK to dismiss the Local Launch and Activation Permissions dialog box.

In the Identity tab, select This user and type the name and password for the opc user (created in step 1).

If the OPC server runs as a service, make sure that the service runs as the opc user (created in step 1) and not as the system account. Consult your system administrator for information on how to configure a service to run as a specific user.

Repeat steps 4 through 10 for each of the servers you want to connect to.

On the client machine(s), create the identical local user with the same name and password permissions as you set up in step 1 of OPC Server Machine Configuration.

Select Start > Control Panel. Double-click Administrative Tools and then double-click Component Services. The Component Services dialog appears.

Browse to Component Services > Computers > My Computer. Right-click My Computer and select Properties.

Click the Default Properties tab, and ensure that:

Click the COM Security tab.

For the Access Permissions, click Edit Default and ensure that the opc user is included in the Default Security list, and is granted both Local Access and Remote Access permissions.

Click OK to close the Default Access Permissions dialog box.

Still under Access Permission", click Edit Limits and ensure that the opc user is included in the Security Limits list, and is granted both Local Access and Remote Access permissions.

Click OK to close the Security Limits dialog box.

For the Launch and Activation permissions, click Edit Default and ensure that the opc user is included in the Default Security list, and is granted all rights (Local Launch, Remote Launch, Local Activation, and Remote Activation).

Click OK to close the Default Access Permissions dialog box.

Still under Launch and Activation Permission, click Edit Limits and ensure that the opc user is included in the Security Limits list, and is granted all rights (Local Launch, Remote Launch, Local Activation, and Remote Activation).

Click OK to close the Security Limits dialog.

Click OK. A dialog warns you that you are modifying machine-wide DCOM settings.

Click Yes to accept the changes.

Ensure that the Guest user account is enabled. (The Guest account is disabled by default on Windows 7 machines). Consult your system administrator for information on how to enable the Guest account.

Select Start > Control Panel. Double-click Administrative Tools and then double-click Component Services. The Component Services dialog appears.

Browse to Component Services > Computers > My Computer. Right-click My Computer and select Properties.

In the Default Properties tab, make sure that Enable Distributed COM On This Computer is selected. Select None as the Default Authentication Level, and Anonymous as the Default Impersonation Level.

In the COM Security tab, select Edit Limits from the Access Permissions and ensure that Everyone and ANONYMOUS LOGON are both granted Local Access and Remote Access.

In the COM Security tab, select Edit Limits from the Launch and Activation Permissions and ensure that Everyone and ANONYMOUS LOGON are both granted Local and Remote permissions (Local Launch, Remote Launch, Local Activation and Remote Activation).

Run the Prosys OPC UA Simulation Server.

In the Endpoints tab, Register to pane, check the option Local Discovery Server.

In the Certificates tab, select the SimulationServer node and click Open in File Explorer.

Copy the SimulationServer.der file to C:\ProgramData\OPC Foundation\UA\Discovery\pki\trusted\certs.

Restart the Prosys OPC UA Simulation Server.

In the MATLAB Command Window, discover OPC UA servers published by the LDS. You should see an entry named SimulationServer.

opcuaserverinfo localhost

ans = 

OPC UA ServerInfo 'SimulationServer':

   Connection Information
    Hostname: 'opc-demo1.my.local'
        Port: 53530