The Conveying UC describes the automatic adaption of the Shearer’s speed depending on the AFC’s load.

The Shearer cyclically reads the State of the AFC. If the AFC’s State is RUNNING, the Shearer reads the Load-Variable from the AFC. If the AFC’s Load exceeds a parameterizable threshold, the Shearer’s speed is limited to a certain value. For advanced operation, the AFC’s Load can be used for a linear increase of the Shearer’s maximum speed. Figure 5 displays the sequence diagram of this UC.


Figure 5 – Sequence diagram of the Conveying Use Case