Package org.lsst.ccs.subsystem.shutter

This package contains the CCS subsystem components that operate the LSST camera shutter.

See: Description

Interface Summary

Interface	Description
PLCEventSubmitter

Class Summary

Class	Description
Alerts	All the alerts that this subsystem can raise.
Commands	Commands subsystem component, accepts commands.
Controller	The subsystem component responsible for all communication with the Beckhoff PLC controller running the shutter, which includes caching the last status message(s) received from the PLC.
Publisher	The publisher of all messages going out on the CCS status bus.
RealActions	An implementation of the Actions interface that forwards most actions to the StateMachine component or to the Controller component.
SimulatedActions	An implementation of Actions in which no hardware operations are performed.
SimulatedShutter	Uses a thread to simulate an external shutter controller.
StateMachine	Owns and operates the central shutter-control state machine.
Watchdog	Keeps track of the number of PLC messages received and if none are received within a configurable interval, raise a PLC_WATCHDOG alert of severity WARNING.

Package org.lsst.ccs.subsystem.shutter Description

This package contains the CCS subsystem components that operate the LSST camera shutter. It does so by using the ADS protocol driver to send commands to and receive status information from the Beckhoff PLC controller which has two EL7047 stepper motor controller/drivers, axis brake control lines, axis limit switches and, for measuring motion profiles, a series of Hall switches. The subsystem implements the commands described in the shutter subsystem manual LCA-16765.

Author:

tether

See Also:

org.lsst.ccs.subsystem.shutter.statemachine, org.lsst.ccs.subsystem.shutter.plc