Drive control apparatus

A drive control apparatus of a safety system, the drive control apparatus comprising:

• a detection unit that detects operating values of a drive unit including at least one of a speed, a position, acceleration, an amount of movement, a movement direction and torque, and outputs a signal indicating one or more physical parameters associated with detected operating values (“DOV”) that indicate an operating state of the drive unit;
• and
• a cut off unit that cuts off supply of electric power to the drive unit when the one or more DOV physical parameters are outside a first upper to lower limit range;
• a safety unit that outputs, a warning when the DOV physical parameters are within the first range and additionally is outside a second upper to lower limit range, based on an input signal from the detection unit,
• wherein the second range is narrower than the first range, and
• wherein the warning includes information regarding whether the one or more DOV physical parameters are lower than the second lower limit range or whether the one or more DOV physical parameters are greater than the second upper limit range.