APC AP9212 User's Guide Page 41

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time. This way, any connected users would be able to discern exactly what the system was
doing, an invaluable tool for debugging and monitoring.
A solution, suggested by Keith Bannister, would be to create a JASMessageSender (see
Appendix B.2) as a registered ProcessListener on the server side, to broadcast
ProcessEvents as JASMessages to clients. Thus allowing all connected users to monitor JAS
processes.
Figure 5-3 Process manager
5.4 Roof
For users unfamiliar with the APT System, the operation of the Roof should seem trivial. Behind the
scenes there are many complications and issues with its operation due to the complexity of the
control system and the large number of safety considerations. This complexity has been
abstracted by the apt.modules.roof control software, designed and developed in [ 52 ]. As a
result of this, the state of the roof can be interpreted as a combination of the following variables:
MAN_AUTO: This represents the state of the Manual / Auto switch on the side of the
Control box at the APT Site. This must be set to AUTO for the software to operate. Possible
values are UNKNOWN, MANUAL, AUTO
EMERG: This is the roof emergency stop button on the same box. The roof will not function
if this button is set. Possible values are OK and EMERG
POS: The current position of the roof. Possible values are OPEN, CLOSED, MIDDLE,
UNKNOWN
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