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Axis Velocity Data

ActualVelocity: is the rate of change of the actual position of the axis read from the drive interface which is read from the feedback deviceA process whereby some proportion of the output signal of a system is passed (fed back) to the input. In automation, a device coupled to each motor to provide indication of the motor's shaft angle, for use in commutating the motor and controlling its speed and position.
feedback device
drive interface ActualPosition(n) – ActualPosition(n-1)
Command Velocity: the rate of change in command position. This velocity is tied ot the Status output of the MC_Power function block. Since command velocity is the rate change of command position:
- When the Status = 1 the command velocity is the rate of change of the command position sent to the drive interface to command the axis.
- When the Status = 0 the command velocity tracks the Actual Velocity