Fixed as of:
Behavior of the new version:
Behavior description:
If more than 8 bytes are combined - e.g. in a string - and are to be exchanged with the PLC task via OPC UA, it can happen that the string does not arrive consistently at the OPC UA client when changes are made.
Under what conditions does the behavior occur?
More than 8 bytes are transmitted in a variable.
Affected products:
Controller c5x0 (All versions)
Workaround:
If the data to be transmitted has been combined in a string, then a checksum should be added to the end of the string. This should also be formed on the receiver side. If both checksums (of the receiver and the sender) match, the data is transferred - otherwise it is not transferred and is read again.
Rating/Recommendations:
A consistent data exchange to the PLC task is possible up to 8 bytes. Beyond that, this can be solved in the application (see short-term measures).
Note: No change is planned to this behaviour
