Thanks for your responses. It is correct that I "lose" time when the OPC server is running.
I have now tested the Meinberg NTP distribution. The result is unchanged from 4.2.0. OPC is a set of standard software interfaces used in industrial automation applications. In our system we use the Microsoft COM-based OPC Data Access 2.0 and Alarm&Events 1.0 interfaces. For more OPC information: http://www.opcfoundation.org/. It is worth mentioning that the unstable clock problem occurs even when I run the OPC server standalone, i.e. with no OPC client connected and without the OPC server's underlying data source devices (PLCs) connected. Also worth mentioning is that the embedded computer does not exhibit high CPU load, the CPU load is 3-5% when NTP and the OPC server is running. I will contact the OPC server vendor. I am of course still interested in further hints and tips. Geir _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
