Techniques for communicating data amongst controllers in a power supply system

A power supply system, comprising

• an uninterruptible power supply (UPS) having an output terminal selectively coupled to at least one of a bypass voltage source and an uninterruptible power source;
• a bypass switch electrically connected between the bypass voltage source and the output terminal;
• a UPS switch electrically connected between the uninterruptible power source and the output terminal,
• a first local controller interfaced with the uninterruptible power supply and configured to receive a present measure of a parameter associated with the UPS;
• and
• a managing controller in data communication with the first local controller, wherein the local controller is operable to compare the present measure to a control window and transmit the present measure to the managing controller when the present measure falls outside of the control window, where the control window defines a minimum value for the parameter and a maximum value for the parameter.

A power supply system, comprising

• an uninterruptible power supply (UPS) configured to receive an AC input signal from a bypass voltage source and a uninterruptible power source and having an output terminal selectively coupled to at least one of the bypass voltage source and the uninterruptible power source, wherein the UPS includes
• a bypass switch electrically connected between the bypass voltage source and the output terminal;
• a converter circuit configured to receive the AC input signal from the uninterruptible power source;
• a UPS switch electrically connected between the converter circuit and the output terminal,
• a first local controller interfaced with the uninterruptible power supply and configured to receive a present measure of a parameter associated with the UPS;
• and
• a managing controller in data communication with the first local controller, wherein the local controller is operable to compare the present measure to a control window and transmit the present measure via a controller area network to the managing controller when the present measure falls outside of the control window, where the control window defines a minimum value for the parameter and a maximum value for the parameter.