SV-iS7 User Manual - Inverter Drive Supermarket

Chapter 10 Protective Functions
10-13
Set the underload ratio at an operating frequency twice the motor rated slip speed(BAS-12 Rated Slip) at PRT-27.
Set the underload ratio at the base frequency (DRV-18 Base Freq) at PRT-28. If variable torque is necessary like a fan
or pump, set the PRT-04 Load Duty at No. 0 Normal Duty. In case of No. 1 Heavy Duty, it is set at the load for constant
torque such as elevating devices or a conveyer.
PRT-26 UL Warn Time, PRT-28 UL Trip Time : The protective function becomes activated if the underload level
condition described above continues for the warning time or failure time. This function is not activated during the
energy saving operation (ADV-50 E-Save Mode).
10.1.11 Overspeed error
This function is activated when the control mode(DRV-09 Control Mode) is Vector.
Group Code No. Function Display Setting Display Unit
PRT
PRT-30
70 Over SPD Level - 60.00 Hz
72 Over SPD Time - 0.01 Sec
If the motor rotates faster than the overspeed frequency(Over SPD Freq) for overspeed detection time(Over SPD
Time), the inverter blocks output.
Output Current
PRT-29
Output
Frequency
Rated slipX2 Base Frequency
Output Current
PRT-30
Set at normal load(Normal duty:VT)
Rated Current X2 Output Frequency
Set at heavy load(Heavy duty:CT)