| Package | Description |
|---|---|
| org.lsst.ccs.subsystem.shutter |
This package contains the CCS subsystem components that operate the LSST camera shutter.
|
| Class and Description |
|---|
| Controller
The subsystem component responsible for all communication with the Beckhoff PLC controller running the
shutter, which includes caching the last plcStatus message(s) received from the PLC.
|
| Publisher
The publisher of all messages going out on the CCS status bus.
|
| 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.
|
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