Route Command Processing (2)

• A route must be defined, according to provisioned data.
• The route command must be refused if any of the following conditions are true:
  • The route goal is locked.
  • An interdiction is "on" for any route element.
  • A switch within the route is locked and in the adverse position.
  • Any route element is currently used by another route.
• An accepted route command must result in setting the route, i.e., all elements are now part of this route.
• Switches in the wrong position must be thrown over.
• The start signal is cleared for a route, which then enters the state "proving" as soon as all of the following conditions are true:
  • The start signal is not locked.
  • The start signal is not faulty.
  • All rail elements are free.
  • All switches are in the correct position.