Toshiba Tosvert VF-AS1 - Manual (Page 125)

E6581301
F-13
6
6.7 Operation frequency
6.7.1 Start frequency /Stop frequency
H : Start frequency setting
H : Stop frequency setting
• Function
The frequency set with the parameter H is put out as soon as operation is started.
Use the H parameter when a delay in response of starting torque according to the
acceleration/deceleration time is probably affecting operation. Setting the starting frequency to a value from
0.5 to 2.0Hz (max. 5Hz) is recommended. The occurrence of an overcurrent can be suppressed by setting
this frequency below the rated slippage of the motor. If 0 speed torque is needed (RV=, ), set H,
H
at 0.0Hz.
• At start up : frequency set with H is put out immediately.
• At stop
: The output frequency drops to 0Hz immediately by the frequency set with H.
[Parameter setting]
Title Function Adjustment range Default setting
H Starting frequency setting ~Hz
H Stop frequency setting ~Hz
Start frequency setting H
Stop frequency setting H
Output frequency [Hz]
Time [s] 0
Note: Set these parameters so that the start frequency H is higher than the stop frequency H .
If the H -set frequsency is lower than the H -set frequency, the reference frequency must be
higher than the H-set frequency to start the motor.
If both H and H are set to Hz, the motor will start even if the frequency set is 0.0Hz.
6.7.2 Run /Stop control with frequency setting signals
H : Operation start frequency
H : Operation start frequency hysteresis
• Function
The Run/Stop of operation can be controlled simply with frequency setting signals.
[Parameter setting]
Title Function Adjustment range Default setting
H Operation starting frequency ~HJ
H Operation starting frequency hysteresis ~Hz