Error handling and messaging
| When the failure of a component is registered, the driver records this fact in the component-specific WinCC OA data point. |
| The first incoming message routed via the faulty component (which can be deduced from the source address) revalidates this component in the component-specific WinCC OA data point. The dependent data points are automatically set to valid by the incoming GA data. |
| The internal exchange of error messages in WinCC OA is handled by the WinCC OA standard error handling mechanisms (the sending of an error data point). |
| Errors detected by the driver are also always signaled to the Event Manager (e.g. overflow of input buffer). |
