Example of output frequency detection signal (FU)
All signals are OFF during DC injection brake.
The output frequency compared with the set frequency changes depending on the control method.
General-purpose magnetic flux
IPM motor control
Changing the terminal assignment using Pr.190 and Pr.192 (output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr. 190, Pr. 192 (output terminal function selection)
Function assignment of external terminal and control
(3) Speed detection hysteresis (Pr.870)
This function prevents chattering of the speed detection
When an output frequency fluctuates, the up to frequency
signal (SU) and output frequency detection signals (FU) may
repeat ON/OFF (chatters). Setting hysteresis to the detected
frequency prevents chattering of these signals.
Compared Output Frequency
Output frequency before slip compensation
Estimated frequency (actual motor rotation per minute)
Refer to page 140)
Setting a higher value to this parameter slows the
response of frequency detection signals (SU and FU).