Method, device, and computer program for verifying power supply monitoring

A device for verifying a function of a power supply monitor in a digital control system, wherein the power supply monitor is adapted to monitor whether or not a power supply voltage is between a lower threshold value and an upper threshold value, the device comprising

• a controller in communication with a power supply voltage regulator and the power supply monitor, wherein the controller is configured to:
• send a first control signal to the power supply voltage regulator to set the power supply voltage to a first value the first value being below the lower threshold value,
• check, as a first check, that a first feedback signal received from the power supply monitor indicates that the power supply voltage is below the lower threshold value,
• send a second control signal to the power supply voltage regulator to set the power supply voltage to a second value, the second value being above the lower threshold value and below the upper threshold value,
• check, as a second check, that a second feedback signal received from the power supply monitor indicates that the power supply voltage is above the lower threshold value, and
• verify the function of the power supply monitor if both the first check and the second check are successful.

A computer program on tangible medium comprising computer executable instructions which, when executed by a computer, causes the computer to perform a method of verifying a function of a power supply monitor in a digital control system, wherein the power supply monitor is adapted to monitor whether or not a power supply voltage is between a lower threshold value and an upper threshold value, the method comprising

• setting the power supply voltage to a first value, the first value being below the lower threshold value,
• checking, as a first check, that the power supply monitor indicates that the power supply voltage is below the lower threshold value,
• setting the power supply voltage to a second value, the second value being above the lower threshold value and below the upper threshold value,
• checking, as a second check, that the power supply monitor indicates that the power supply voltage is above the lower threshold value, and
• verifying the function of the power supply monitor if both the first check and the second check are successful.