Abstract: A half-bridge inverter comprised of upper and lower switches can be placed in linear motor track sections to alternately connect a common point of all drive coils to a full-bus DC power rail (“full-bus”) and a DC reference, according to PWM command signals, functioning as a “virtual mid-bus” to allow bi-directional flow of a sum of currents of all drive coils in the section. Separate upper and lower drive switches of the half-bridge inverters that are also connected to drive the drive coils can then be controlled, according to separate PWM command signals, to synchronize their PWM cycles and duty cycle commands with respect to the virtual mid-bus at times when a mover is not present, resulting in zero voltage across the drive coils, or command different duty cycles with respect to the virtual mid-bus when a mover is present, resulting in a desired voltage across the drive coils. The desired voltage can produce a current in the drive coils to electromagnetically propel the mover.

Abstract: One or more non-transitory computer-readable media having stored thereon program instructions to facilitate the display of multiple errors is provided. The program instructions, when executed by a computing system, direct the computing system to at least initiate display of a graphical view of an industrial automation environment. The program instructions also direct the computing system to detect a plurality of error conditions related to machine operations within the industrial automation environment, and to determine a plurality of locations within the graphical view associated with the plurality of error conditions. The program instructions further direct the computing system to identify at least one group of error conditions from the plurality of error conditions based on the plurality of locations, and to initiate display of a graphical representation of the at least one group of the error conditions.