4-244 
11-34  DC Voltage Filter Fall Amount 
Range 
0.00~1.00 V 
 
11-35  DC Voltage Filter Deadband Level 
Range 
0.0~99.0 V 
 
11-36  Frequency gain of OV prevention   
Range 
0.000~1.000 
 
11-37  Frequency limit of OV prevention 
Range 
0.00~10.00 Hz 
 
11-38  Deceleration start voltage of OV prevention 
Range 
200~400 V : 200V 
400~800 V : 400V 
575V: 500~1000V 
690V: 600~1200V
 
 
11-39  Deceleration end voltage of OV prevention 
Range 
300~600 V : 200V 
600~1200 V : 400V 
575V: 500~1000V 
690V: 600~1200V
 
 
11-40  OV prevention selection 
Range 
0: 
Disable 
1: OV prevention Mode 1   
2: OV prevention Mode 2 
3: OV Prevention Mode 3 
 
Overvoltage suppression is used for the application of likely causing to energy recharge.     
   
Example: there are two situations causing excessive energy to recharge the inverter in stamping application 
 
 
(1) When cam clutch is not engaged, the motor will accelerate and start flywheel. When motor decelerates, the 
rotation speed will higher than motor speed owing to the large flywheel’s inertia and then recharge the inverter.   
(2) When cam clutch is engaged, the motor will start flywheel and compress the spring. When the highest point of 
the cam moves beyond its center, the spring will release the power to the flywheel and excessive energy 
output recharge the inverter.