Analog attribute runtime behavior: time propagation

If you configure the access mode as Input or InputOutput, the field attribute’s time stamp always reflects the time stamp of the input.

If you configure the access mode as Output or InputOutput, the time stamp provided by the value or time set request is forwarded to the output. The value is based on the field attribute's existing value.

If you configure the access mode as Output, the timestamp provided by the value set request is used to update the field attribute if it is not zero. Otherwise, the current time is used.