DCOM Troubleshooting & Configuration

COM/DCOM is the underlying architecture/framework that OPC is based on. Therefore, if you are logging data from an OPC Server then the connection between the OPC Data Logger application and your OPC Server is being managed by COM/DCOM, referred to herein as "DCOM".

 

DCOM provides security allowing you to specify users or groups of users who can access specific COM objects such as OPC Servers. If these settings are not correct then Windows will deny the application access to the OPC Server, which will consequently prevent data from being collected.

 

DCOM configuration is a 2-way process:

 

  1. DCOM permissions must be specified on the OPC Server computer.

  2. DCOM permissions must be specified on the OPC Client computer, specifically the computer with the application.

 

The general DCOM Tutorial that is installed with this product explains step-by-step how to configure your DCOM security settings as required by the items in the above list for various operating systems.   You should first review the OPC DataLogger DCOM specifics, then go to the General DCOM Tutorial and setup your DCOM settings with the OPC DataLogger DCOM specifics in mind.

OPC DataLogger DCOM Specifics

Please review these topics in this order:

 

Related Topics