Bender FTC470XET, Operating Manual

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Application of the internal OPC server
58 TGH1375en/02.2010
8.2 OPC compatibility with Windows 2000 or Windows XP
The OPC software interface is based on Microsoft DCOM technology. By default, the DCOM
interface of a Windows operating system is protected. If a connection between a Windows-
based PC and an OPC server cannot be established, some restrictions of the DCOM interface
have to be removed.
For these changes, administrator access rights are required.
The first step could be to reduce the DCOM security in order to reduce the restrictions of the
DCOM interface for all users. If the OPC communication will then be possible, it is reasona-
ble to increase the security again step by step.
Described are the changes for Windows 2000 and Windows XP. Each of the screenshots on
the left show the Windows 2000 user interface. Proceed as follows:
Windows 2000
1. Click on the "Start" button in the taskbar and click "Execute". The respective window will appear.
2. Enter "dcomcnfg“ into the edit field and confirm with "OK". A window opens, click on "Default prop-
erties" here.
Windows XP
1. In the taskbar, click "Start", then click on "Execute" to open the respective window.
2. Type "dcomcnfg“ into the edit field and confirm with "OK". The respective window opens, now click
"Component Services", click "Computer", click "My Computer", and then right-click to open the con-
text menu. In the context menu, click "My Computer Properties". There click on the "Default Proper-
ties“ tab.
Fig. 8.1: Windows 2000 Windows XP
Settings on the DCOM interface may only be carried out by the EDP administrator be-
cause these settings may affect the user administration and networks can be dam-
aged.