Stop At Lower-Limit Frequency Operation (Sleep Function - Toshiba Tosvert VF-S15 Instruction Manual

Note1: Nearly the same motor shaft fixing control can be exercised when entering a DC braking command with the
signal at an input terminal.
Note2: If a power failure occurs during motor shaft fixing control and the motor starts to coast, motor shaft
fixing control will be canceled.
Also, if the inverter trips during motor shaft fixing control and is restored to working order by the retry
function, motor shaft fixing control will be canceled.
Note 3: During shaft fixing control, the carrier frequency becomes the setting of whichever is lower parameter,
f249 or f300.
6.13 Stop at
lower-limit frequency operation (sleep function)
f256 : Time limit for lower-limit frequency operation
f259 : Lower limit frequency reach time limit at start-up
f391 : Hysteresis for lower-limit frequency operation
 Function
If operation at the lower-limit frequency () is carried out for the time set with , the inverter will
automatically decelerate the motor to stop for the purpose of energy-saving. At that time, "" is
displayed (alternately) on the operation panel.
Stop by this function will be canceled if a frequency command value exceeds the lower-limit frequency
(ll) f391 (Hz), or if the operation command is OFF. This function will not work until the output
frequency reaches ll at the start of operation.
If the output frequency doesn't reach ll at the start of operation for malfunction of load, the inverter will
automatically stop after the time set with f259 elapses.
[Parameter setting]
Title
Time limit for lower-limit frequency
f256
operation
Lower limit frequency reach time limit at
f259
start-up
Hysteresis for lower-limit frequency
f391
operation
Function
0.0: Disabled
0.1 - 600.0 (s)
0.0: Disabled
0.1 - 600.0 (s)
0.0-ul (Hz)
F-49
Adjustment range Default setting
E6582175
6
0.0
0.0
0.2