Parker 590+ series, Product Manual, Page: 371 / 545

Programming
D-27
DC590+ Series DC Digital Drive
AUTOTUNE ABORTED User abort of the process.
FIRING ANGLE Firing angle has reached 60deg. before zero voltage crossing, in an attempt to derive a 60deg. wide pulse – likely
absent armature or severely resistive load.
PEAK/AVER.RATIO Badly shaped current pulse, where the pk/average current ratio is more than 30% away from expected 1.5.
UNBALANCED BRID. Pulse size imbalance greater than that from a motor BEMF equivalent to 5deg. from zero voltage crossing – likely
poorly balanced supply phases or motor shaft turning.
NULL AVERAGE CUR No current pulses detected.
THYRISTOR OFF Missing pulse detected – likely missing firing pulses from one or more thyristors.