Introduction
This topic describes the operating states for M580 standalone and Hot Standby controllers.
Operating States for Standalone Controllers
All standalone M580 PACs have these operating states:
Operating State |
Description |
|---|---|
AUTOTEST |
The controller is executing its internal self-tests. NOTE: If extended
backplanes are connected to the main local backplane and line terminators
are not inserted into the unused connectors on the backplane extender
module, the controller remains in AUTOTEST after the self-tests have completed.
|
NOCONF |
The application program is not valid. |
STOP |
The controller has a valid application, but it is stopped. The controller sets itself to predefined STOP state parameters, and can be restarted later. |
HALT |
The controller has an application, but it has stopped operating due to an error resulting in a blocking condition, which puts the controller in a HALT state, resulting in a recoverable or nonrecoverable condition. |
RUN |
The controller is executing the application program. |
WAIT |
The controller is in a transitory state while it backs up data when a power down condition is detected. The controller starts again only when power is restored and the supply reserve is replenished. As it is a transitory state, it may not be viewed. The controller performs a warm restart to exit the WAIT state. |
ERROR |
The controller is stopped because a hardware or system error is detected. When the system is ready to be restarted, the controller performs a cold start to exit the ERROR state. |
OS DOWNLOAD |
A controller firmware download is in progress. |
Monitoring the Controller Operating State
The LEDs on the controller front panel provide indications of its operating state.