org.lsst.ccs.subsystems.fcs.common

Interface FilterHolder

All Known Implementing Classes:

Autochanger, BasicAutoChanger, Carousel, FakeFilterHolder, Loader, SftAutoChanger, SftCarousel

public interface FilterHolder

The autochanger module for the whole Filter Exchange System or the fake autochanger module implements this interface. In the case of the whole Filter Exchange System, when there is a carousel, an autochanger and a loader, the sensors of the autochanger latches tell us if the filter is held by autochanger or not. When carousel or loader are in standalone mode, there is no autochanger hardware. But sometimes we want to test that the hardware as if the autochanger was holding a filter. This is done usualy with a numeric switch and a sensor that can be read to know the value of the switch.

Author:

virieux

Method Summary

Modifier and Type	Method and Description
boolean	isAtHandoff() This method returns true if the autochanger trucks are at HANDOFF position, false otherwise.
boolean	isAtStandby() This method returns true if the autochanger trucks are at STANDBY position, false otherwise.
boolean	isHoldingFilter() This method returns true if the FilterHolder is holding a filter, false otherwise.
void	updateStateWithSensors() This method read values sent by the sensors and update state from this new values.

Method Detail

isHoldingFilter

boolean isHoldingFilter()

This method returns true if the FilterHolder is holding a filter, false otherwise.

Returns:

Throws:

FcsHardwareException

isAtHandoff

boolean isAtHandoff()

This method returns true if the autochanger trucks are at HANDOFF position, false otherwise.

Returns:

isAtStandby

boolean isAtStandby()

This method returns true if the autochanger trucks are at STANDBY position, false otherwise.

Returns:

updateStateWithSensors

void updateStateWithSensors()

This method read values sent by the sensors and update state from this new values.

Throws:

FcsHardwareException