System for ensuring continued operation of fan notwithstanding bmc failure
AssigneeFulian Precision Electronics (Tianjin) Co., LTD.
InventorXIAO-LONG ZHOU
Life of this patent
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Abstract
A system for maintaining the operation of a cooling fan for a server if that function of a baseboard management controller (BMC) of the server should fail includes the BMC and a control module. The control module is electrically connected to the BMC and the fan, and the control module receives a first signal outputted by the BMC in a cycle and determines the state of the BMC depending on whether the first signal includes a change in level or fails to include a change in level. When an abnormal state of the BMC is determined, the control module outputs a preset pulse width modulation (PWM) signal to the fan to maintain operation of the fan.
Claims10
A fan control system configured for controlling a fan to operate and comprising:
- a baseboard management controller (BMC);
- a control module electrically connected to the BMC and the fan, and configured to receive a first signal outputted by the BMC and determine whether the BMC is in an abnormal state according to the first signal;
- wherein when the BMC is in an abnormal state, the control module outputs a preset pulse width modulation (PWM) signal to the fan to keep continuous operation of the fan;
- and
- wherein when the first signal is in an error state continuously within a preset number of cycles, the control module determines the BMC is in the abnormal state.
A fan control system configured for controlling a fan to operate and comprising:
- a baseboard management controller (BMC);
- a control module electrically connected to the BMC and the fan, and configured to receive a first signal outputted by the BMC and determine whether the BMC is in an abnormal state according to the first signal;
- wherein the error state is that level state of the first signal remains unchanged.
- wherein when the BMC is in an abnormal state, the control module outputs a preset pulse width modulation (PWM) signal to the fan to keep continuous operation of the fan;
- and
- wherein when the first signal is in an error state continuously within a preset number of cycles, the control module determines the BMC is in the abnormal state.
Dependencies are inferred from the claim text.