controller software becomes corrupted or stops executing. If a fault arises in the
hardware watchdog timer circuit, the controller would not be protected from corrupt
software execution. Therefore, a run-time diagnostic check verifies the watchdog timer
hardware integrity. If a fault is detected in the watchdog timer hardware circuit, a soft
failure condition occurs. Refer to the Hardware Watch dog Timer for more information.
The failed controller module does not contain any diagnostic data, although the
redundant partner module may contain some useful information.
Communications Failure
The FTE Status Server and FTE Auxiliary display includes detailed information on FTE
links monitored by the FTE Provider. Refer to the Fault Tolerant Ethernet Status
Display User's Guide for more details.
10.10
Communication and system time faults during
startup
The tables in this section help to provide guidance for determining the cause of abnormal
startup conditions in the C300 Controller. These conditions may occur when the
controller
ï‚·
Cannot establish normal communication on the FTE network
ï‚·
Cannot obtain its network address from the system's BootP Server
ï‚·
Cannot obtain system time from the time source configured for the domain in which
it resides,
ï‚·
Finds that CDA services are not available.
Various indications on the controller's faceplate display or the state of the Control
Builder icon that represents the C300 Controller (if the controller had been loaded
previously) are described that point to an abnormal condition.
There are six tables that detail the abnormal conditions for both redundant and non-
redundant controller configurations and whether or not the controller memory has been
retained through the battery backup.
Corrective actions for resolving these conditions are found in the below mentioned
tables, (refer the Notes).
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