sensors

Description

An array of sensor objects that make up the fan enclosure object. The sensors are what's monitored to determine the functional state of the fan.

A sensor's functional range is determined by the following equation(where [target] is current requested target of the fan):

• Minimum = ([target] _ (100 - deviation) / 100) _ factor + offset
• Maximum = ([target] _ (100 + deviation) / 100) _ factor + offset

Therefore, a fan sensor must be above the minimum and less than the maximum to be deemed functional.

Attribute Value(s)

• name - string
  • The name of the fan tach sensors located under the /xyz/openbmc_project/sensors/fan_tach D-Bus path.
• has_target - boolean
  • Whether this sensor D-Bus object contains the Target property or not.
• target_interface - string (Optional)
  • The D-Bus interface containing the Target property. This defaults to xyz.openbmc_project.Control.FanSpeed for RPM controlled fans or can be set to xyz.openbmc_project.Control.FanPwm for PWM controlled fans.
• target_path - string (Optional)
  • The D-Bus full object path containing the Target property. This defaults to /xyz/openbmc_project/sensors/fan_tach+name.
• factor - double (Optional)
  • A value to multiply the current target by to adjust the monitoring of this sensor due to how the hardware works. This sensor attribute is optional and defaults to 1.0.
• offset - integer (Optional)
  • A value to shift the current target by to adjust the monitoring of this sensor due to how the hardware works. This sensors attribute is optional and defaults to 0.

Example