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).