3.4.4 Combined operation mode
(Operation using the external input signals and PU)
When entering the start signal from outside the inverter and setting the running frequency from the PU
(Pr. 79 = 3)
The external frequency setting signals and the PU's FWD, REV and STOP keys are not accepted. (Note)
Switch power on.
Operation mode selection
Set "3" in Pr. 79 "operation mode selection".
The combined operation mode is selected and the operation status indication "EXT"
and "PU" are lit.
Turn on the start switch (STF or STR).
Note: The motor does not start if both the forward and reverse rotation switches are
turned on. If both switches are turned on during operation, the motor
decelerates (when Pr. 250 = "9999") to a stop.
Running frequency setting
Using the parameter unit, set the running frequency to 60Hz.
The operation command indication "REV" or "FWD" flickers.
• Select the frequency setting mode and make step setting.
Note: Step setting is the way of changing the frequency consecutively by pressing
Hold down the
Turn off the start switch (STF or STR).
The motor stops running.
Note: The stop key is made valid when the Pr. 75 "PU stop selection" value is set to any of 14 to 17.
key to change the frequency.