Motor potentiometer

The motor potentiometer function lets the inverter respond to key commands.

If the digital inputs are activated that increase or decrease the speed, the speed changes along the preset ramps P1-03 and P1-04.

If both digital inputs are activated at the same time, the inverter stops along the rapid stop ramp P2-25. If none of the two inputs are activated, the current speed and direction of rotation are maintained.

The enable is superordinate to this function and is necessary for the function.

To use the motor potentiometer function, select one of the possible function selections of the digital inputs with P1-15 = 10 or 20. Also refer to chapter P1-15 Digital input function selection.

When using this function, the arrow-up and arrow-down keys can also be used directly on the inverter.

After power OFF or revoking the enable, the inverter operates according to the setting in P2-36.

The following figure shows the basic function of the motor potentiometer.

t₁	Inverter enable
t₁ - t₂	Motor accelerates to the set minimum speed (P1-02).
t₂ - t₃	Motor maintains minimum speed.
t₃	Motor potentiometer up is activated.
t₃ - t₄	As long as the signal "Motor potentiometer up" is present, the motor speed is increased along acceleration ramp P1-03.
t₄ - t₅	If the signal "Motor potentiometer up" is no longer present, the current speed is maintained.
t₅	Motor potentiometer up is activated.
t₅ - t₆	As long as the signal "Motor potentiometer up" is present, the motor speed is increased further along the acceleration ramp (P1-03) until it reaches maximum speed (P1-01).
t₆ - t₇	The maximum speed is not exceeded and is maintained, even if the signal "Motor potentiometer up" is no longer present.
t₇	“Motor potentiometer down” is activated.
t₇ - t₈	As long as the signal "Motor potentiometer down" is present, the motor speed is decreased along deceleration ramp P1-04.
t₈ - t₉	When signal "Motor potentiometer down" is no longer present, the current speed is maintained.
t₉	Fixed setpoint speed is activated.
t₉ - t₁₁	As long as the signal is present at fixed setpoint speed, the motor speed is decreased along deceleration ramp P1-04 until it reaches the fixed setpoint speed. This speed is then maintained.
t₁₁	“Motor potentiometer down” is activated.
t₁₁ - t₁₂	As long as the signal "Motor potentiometer down" is present, the motor speed is decreased along deceleration ramp P1-04 but not below the minimum speed P1-02.