There are two modes of operation, Master and Follower. Master Mode provides control of a motor directly via programmed speed setpoints in the MDC. Regulation is maintained by a feedback frequency to the MDC taken from the motor shaft or a downstream shaft pulse encoder. Follower Mode controls a motor’s speed as a ratio to a second motor’s speed or outside frequency source. Ratio setpoints are programmed into the MDC causing the motor to "follow" the lead motor or frequency at a fixed speed ratio. Master Mode has two speed setpoints and two ramp setpoints. Follower Mode has two ratio setpoints and two ramp setpoints. Both modes share a jog speed setpoint and a jog ramp setpoint. All setpoints are retained in non-volatile memory when the unit is powered down.
The Motor Drive Controller has the added feature of allowing real time adjustment of the Speed (Master Mode) or Ratio (Follower Mode) setpoint while the unit is operating a motor drive system. The setpoint may be adjusted via the front panel keypad using the "Up" or "Down" arrow keys, or via 2 User Inputs programmed for increment setpoint and decrement setpoint.
The unit is factory configured for an isolated 0 to 10 VDC drive output signal. The output drive signal can be adjusted to span from 0 to 15 VDC via an accessible potentiometer. The drive output is jumper selectable for an external reference. To use the external reference, the MDC is connected to the drive in place of an external potentiometer.
The Motor Drive Controller has a light weight, high impact plastic case with a clear viewing window. The sealed front panel meets NEMA 4X/IP65 specifications for wash-down and/or dusty environments, when properly installed. Plug-in style terminal blocks simplify installation and wiring change-outs.