Output terminal functions (Pr. 41 to Pr. 50)
4.6 Output terminal functions (Pr. 41 to Pr. 50)
Up-to-speed sensitivity (Pr. 41
You can adjust the ON range of the up-to-speed signal (SU)
output when the output speed reaches the running speed.
This parameter can be used to confirm that the running speed
has been reached and used as the operation start signal etc. for
• Under vector control with encoder: Actual motor speed
(feedback value) is adjusted.
• Under vector control without encoder: Speed estimated valued
• Assign functions to the terminals DO1 to DO3 and ABC to use the SU signal. The SU signal is assigned to the terminal DO2
when shipped from the factory. Use any of Pr. 190 to Pr. 192 and Pr. 195 to change the terminal functions. Changing the
terminal assignment with any of Pr. 190 to Pr. 192 and Pr. 195 may affect the other functions. Check the functions of the
corresponding terminals before making setting. (Refer to page 165.)
• For V/F control, the motor runs at the speed converted from the output frequency.
• SU signal terminal assignment ⇒ Set "1" in any of Pr. 190 to Pr. 192 and Pr. 195 (output terminal function selection) (Refer to page 165.)
Speed detection (Pr. 42, Pr. 43, Pr. 50, Pr. 116
When the speed reaches or exceeds the setting, the output speed detection signal (FU, FU2, FU3 signal) or
speed detection signal (FB, FB2, FB3 signal) is output.
• This function can be used for electromagnetic brake operation, open signal, etc.
• You can also set speed detection used exclusively for reverse rotation.
• This function is effective for changing the timing of electromagnetic brake operation between forward
rotation (rise) and reverse rotation (fall) during vertical lift operation, etc.
The FU signal is output when the speed has reached the output speed.
The FB signal is output when the speed has reached the detected actual motor speed (feedback value).
(the estimated speed of the actual motor speed for vector control without encoder)
Speed detection for
Second speed detection
Third speed detection
(1) Signal operation
The FU, FU2 and FU3 signals function under speed/V/F control. They do not function under torque/position
For V/F control, on/off control is exercised at the speed converted from the output frequency. (The detection actions of the FU
and FB signals are the same.)
0 to 3600r/min, 9999
Speed command value
Forward rotation: On when speed is equal to or higher than in Pr. 42
Reverse rotation: On when speed is equal to or higher than in Pr. 43
On when speed is equal to or higher than in Pr. 50 (both forward and reverse)
Off when speed is lower than in Pr. 50 (both forward and reverse)
On when speed is equal to or higher than in Pr. 116 (both forward and reverse)
Off when speed is lower than in Pr. 116 (both forward and reverse)
0 to 100%
0 to 3600r/min
9999: Same as Pr. 42 setting
0 to 3600r/min
0 to 3600r/min
Actual motor speed