7.4
Setpoint calculation
7.4.1
Overview of setpoint processing
The setpoint can be modified as follows using the setpoint processing:
● Invert setpoint to reverse the motor direction of rotation (reversing).
● Inhibit positive or negative direction of rotation, e.g. for conveyor belts, pumps or fans.
● Minimum speed to avoid standstill when the motor is switched on.
● Skip frequency bands to prevent mechanical resonance effects at specific speeds.
● Limit to a maximum speed to protect the motor and mechanical system.
● Ramp-function generator to accelerate and brake the motor with an optimum torque.
Figure 7-14
Setpoint processing in the inverter
7.4.2
Invert setpoint
Proceed as follows to invert the setpoint:
Interconnect parameter p1113 with a binary signal,
e.g. digital input 1.
Table 7- 15
Parameter
p1113 = 722.1
p1113 = 2090.11
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A
Examples of settings to invert the setpoint
Remark
Setpoint inversion
Digital input 1 = 0: Setpoint remains unchanged.
Digital input 1 = 1: Setpoint is inverted.
Invert setpoint via control word 1, bit 11.
Functions
7.4 Setpoint calculation
349