Honeywell Centraline FALCON, Руководство пользователя, Страница: 260 / 276

FALCON USER GUIDE
EN2Z-0962GE51 R0715 256
AUTOMATIC SAVING OF ONLINE CHANGES
Online changes done via the Excel Web HTML Interface or via the BACnet client
like EBI will be automatically saved every 80 seconds to the non-volatile onboard
Flash memory in the Excel Web controller. The save cycle is not done more often in
order to protect the lifetime of the Flash memory.
Excel Web Controller and Communication Failures
In case of communication failures, the Excel Web controller behaves as follows:
Operating system is stopped
•
The watchdog causes a restart of the controller. On the physical controller this is
not visible. In the Excel Web HTML interface this is indicated by the interrupted
browser access.
•
EBI indicates ´Controller Offline`
•
If a restart of the controller fails, the watchdog relay blocks. If the binary output is
used as alarm connector, the connected device gives a visual or acoustic alarm.
•
EBI indicates ´Controller Offline`
Voltage drop
•
Restart of the controller.
On the physical controller this is not visible.
•
EBI indicates ´Controller Offline`.
Network cable damaged
•
Link LED on the controller is OFF (depending on failure).
•
EBI indicates ´Controller Offline` during the time of power failure and controller
restart.
LON bus not accessible, LON cable break, or LON node not available
Identifying LON communication failures must be done in the application, for
example, by using one datapoint of the module that represents the LON module.
The datapoint must be handled as follows:
•
General: assign alarm text
•
For inputs: activate heartbeat
•
For outputs: set acknowledged service
The datapoint alarm created due to the LON failure is displayed in the BACnet alarm
list.
CONTROLLER OVERLOAD INDICATORS
The following behavior indicates an overload of the Excel Web controller:
•
Multiple controller restarts due to Web Interface access
•
Racl execution times are close to or larger than the cycle time
Action to find Cause Result of Action Cause Action to Resolve Overload
1. Stop BACnet Point Server Immediate faster Racl
Execution Times Too many ReadProperty /
ReadPropertyMultiple from
BACnet client
Change EBI tuning parameter:
Sample period to use COV / RPM
to force more COVs and less
RPMs