void CloseCover()Sub CloseCoverWhile the cover is closing CoverState must return Moving.
When the cover is closed CoverState must return Closed.
If an error condition arises while moving between states, CoverState must be set to Error rather than Unknown.
| NotImplementedException | When CoverState returns NotPresent. |
| NotConnectedException | When Connected is False. |
| DriverException | An error occurred that is not described by one of the more specific ASCOM exceptions. Include sufficient detail in the message text to enable the issue to be accurately diagnosed by someone other than yourself. |