Controller Boot And Watchdog Behavior - Honeywell Centraline FALCON User Manual

USER GUIDE
2. Unplug Ethernet
Execution time slowly
decreasing
Execution time not
decreasing
Execution time
decreasing
Execution time not
decreasing

CONTROLLER BOOT AND WATCHDOG BEHAVIOR

The following describes the controller boot and watchdog behavior.
BACStack
XW System The XW* (Excel Web) System has the following functions:
• Controls available memory, BACstac and XLWebExe threads
• Communicates with CARE (Date/Time and IP settings)
• Triggers watchdog every 10 sec.
If the watchdog is not triggered within 40 sec, a cold boot will happen.
If the second boot trial fails within 40 sec, the following will happen:
• the Watchdog relay opens
• the watchdog LED lights up
• controller will stay in "Reset-lock".
(Now, Power "off/on" or Reset button is necesary)
NOTES:
The watchdog does not "supervise" the application, it "supervises" the Operating
System of the Excel Web controller.
If the controller has no power, the watchdog relay is opened.
Example:
If the application or parts of it are stopped, the watchdog relay will not open, unless
the Operating System is affected.
Too many COV Notifications
Unknown
Continue with action 2.
Load comes from COV of point
references
Reset or Cold Boot
LINUX Reboot
XW System*
XL WebExe
257
Increase COV Hysteresis
Change EBI tuning parameter:
Sample period to use COV / RPM
to force less COVs and more
RPMs
Increase COV Hysteresis of point
Application too big for required
cycle time -> increase cycle time.
Watchdog
EN2Z-0962GE51 R0715
FALCON