Toshiba Tosvert VF-AS1 - Manual (Page 130)

E6581301
F-18
6
6.9 Auto-stop in case of lower-limit frequency continuous operation
H : Time limit for lower-limit frequency operation
• Function
If operation is carried out continuously at a frequency below the lower-limit frequency (NN) for the period
time set H, theinverter will automatically slow down the motor to a stop.
“NUVR” is always displayed on the operation panel. (Blinking alternately)
The auto-stop function will be disabled when the frequency command value reaches over the lower limit
frequency (NN)+0.2Hz or the operation command is turned to off.
[Parameter setting]
Title Function Adjustment range Default setting
H
Auto-stop in case of lower-limit frequency
continuous operation  :None
 ~  sec.

Output frequency [Hz]
H H H
Time [s]
Operation signal (F-CC)
ON
OFF
NN +0.2Hz
NN
Note:This function is enabled even at the start of operation and during switching between forward and reverse run.