Technical data
Drive functions
7.1 Servo control
Function Manual
Function Manual, 06/2012, 6SL3097-4AB10-0BP4
143
7.1.9 V/f control for diagnostics
Description
With V/f control, the motor is operated with an open control loop and does require speed
control or actual current sensing, for example. Operation is possible with a small amount of
motor data.
V/f control can be used to check the following:
● Power Module
● Power cable between Power Module and motor
● Motor
● DRIVE-CLiQ cable between the Power Module and motor
● Encoder and actual encoder value
The following motors can be operated with V/f control:
● Induction motors
● Synchronous motors
Note
In V/f mode, the calculated actual speed value is always displayed in r0063. The speed of
the encoder (if installed) is displayed in r0061. If an encoder is not installed, r0061
displays "0".
Structure of V/f control
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Figure 7-14 Structure of V/f control
Prerequisites for V/f control
1. First commissioning has been carried out:
The parameters for V/f control have been initialized with appropriate values.