Open Automation Software
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DCOM Security Configuration

If both Open Automation Software and the OPC Foundation Sample Client are unable to access data from OPC Servers and the OPC Foundation Core components are installed use the following section to setup the DCOM Security of the operating system.

Registry

If it is not possible to edit limits in DCOM (buttons Edit Limits grayed, not like below):

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With regedit delete the 2 restrictions MachineAccessRestriction and MachineLaunchRestriction, in HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindows NTDCOM

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System Wide Configuration

dcomcnfg => System wide configuration

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My Computer => Properties

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Access Permissions => Click Edit Default

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Access Permissions => Click Edit Limits

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Performance… and Distribute COM…  same settings as ANONYMOUS

Launch and Activation Permissions => Click Edit Default…

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Launch and Activation Permissions => Click Edit Limits…

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Performance… and Distributed COM…  same settings as INTERACTIVE

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SYSTEM WIDE CONFIGURATION => ADD A USER IN COM security

If it is necessary to add a user click Add

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Click Advanced

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Click Find Now

COM APPLICATION WIDE CONFIGURATION

OPC enum service DCOM configuration

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