PT CPC5565, Руководство пользователя, Страница: 67 / 118

Sensors
67
Interpreting Sensor Events
PT adopts the following philosophy with respect to threshold sensor event severity levels:
• Non-critical:
A warning that things are somewhat out of normal range, but not really a “problem” yet
• Critical:
Things are still in valid operating range, but are getting close to the edge; unit still operating within
specified tolerances.
• Non-recoverable:
Unit no longer operating within specified tolerances
Non-critical events are informative only - they do not indicate that the board is outside of its
operating limits. In general, no action is required. However, in certain contexts, system/shelf
management software may decide that preventive action should be taken. For example, if
several boards in a shelf report upper non-critical temperature events, the shelf manager might
decide to increase fan speed.
Critical events indicate that the board is still within its operating limits, but it is close to
exceeding one of those limits. Possible action in this case is to closely monitor the alarming
sensor and take more aggressive action if it approaches the non-recoverable threshold.
Non-recoverable events indicate that the board may no longer be functioning because it is now
outside of its operating limits. It is likely that action is required or has already been taken by the
local hardware/firmware. For example, a processor may have shut itself down because its
maximum die temperature was exceeded, or a shelf manager may decide to deactivate the
board because the processor is too hot.