Kontron AT8242 User Manual
Page 96
Thermal Considerations
80
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IPMI non-recoverable / PICMG 3.0 critical/ telco critical:
Temperature has reached a destructive level. Device might be damaged.
Most ATCA chassis react to temperature events in the following manner: When a minor threshold is reached,
the shelf manager will incrementally increase airflow (fan speed) to bring the temperature below the crossed
threshold. When a major threshold is reached, the shelf manager will increase the fans to maximum speed.
When a critical threshold is reached, the shelf manager wills shutdown the blade to prevent damage. The
shelf alarm panel, when available, can inform the operator with LEDs when an alarm (minor, major, critical)
is raised. Refer to your chassis documentation to adapt and optimize your temperature monitoring
application to chassis capabilities. See also System Airflow section for more information.
Below is the list of temperature sensors with their respective thresholds.
Table 6-1:IPMC Temperature Sensors Thresholds
Table 6-2:MMC Temperature Sensors Thresholds (Same list for both NPU)
Sensor ID
Lower Thresholds
Upper Thresholds
Lower Non-
Recoverable
Lower Critical
Lower Non-
Critical
Upper Non-
Critical
Upper Critical
Upper Non-
Recoverable
Temp Inlet
N/A
-5°C
0°C
60°C
70°C
75°C
Temp Outlet
N/A
N/A
N/A
75°C
85°C
100°C
Temp IPMC
N/A
-5°C
0°C
90°C
100°C
110°C
Temp Switch
N/A
-5°C
0°C
85°C
95°C
100°C
Temp SO-DIMM
N/A
-5°C
0°C
75°C
85°C
95°C
Sensor ID
Lower Thresholds
Upper Thresholds
Lower Non-
Recoverable
Lower Critical
Lower Non-
Critical
Upper Non-
Critical
Upper Critical
Upper Non-
Recoverable
Temp DIMM#4
-10°C
0°C
5°C
75°C
85°C
95°C
Temp DIMM#3
-10°C
0°C
5°C
75°C
85°C
95°C
Temp DIMM#2
-10°C
0°C
5°C
75°C
85°C
95°C
Temp DIMM#1
-10°C
0°C
5°C
75°C
85°C
95°C
Temp NPU
N/A
-5°C
0°C
91°C
101°C
106°C
Temp Vcore
N/A
N/A
N/A
75°C
85°C
95°C