Hitachi P1

Page 19
SHOCK-LOAD PREVENTION / DETECTION (CLV)
Shock-Load prevention / detection is only valid while operating in closed loop vector mode (AA121 = 10).
Shock-Load Prevention – When the VFD reaches a constant speed above the low-
padder 
chctual
-lue and

Shock-Load Detection – When the VFD reaches a constant speed above the low-
padder 
trip with an E54 fault. This function is typically used as a snag protection
function.
If the shock-load function is activating under normal condition you will need to increment the shock-padder. Be sure to
only increment the shock-padder by a value of 1 until the shock-load function is no longer activating until normal
conditions.
Function
Parameter
Example Value
Shock-Load Function
UE-52
0 = Disabled
1 = Shock-Load Prevention Enabled
2 = Shock-Load Detection
Padder Value
UE-53 8 (default)