Endodontic instruments having a desired cutting edge are formed, at least in part, using a cold forming process. The control logic circuit is electrically coupled to an enable pin for receiving an input signal, and asserts an internal enable signal for activating the LED driving circuit. In one embodiment, a system receives a peak usage parameter, receives a current megawatt usage for the power grid, compares the current megawatt usage to the peak usage parameter, and powers off one or more electrical machines connected to the power grid if the current megawatt usage is near the peak usage parameter. The cancellation notification portion is configured to notify the transmission-side communication apparatus corresponding to the identification information stored in the first storage portion, of cancellation of a non-executable state of the communication process when the non-executable state of the communication process is cancelled. The syndrome bits vector includes a number of syndrome bits that is identical to the number of check bits.