Chapter 4: AC Drive Parameters
Page 4–135
DURApulse GS4 AC Drive User Manual – 1st Ed, Rev A - 10/20/2017
Type Hex Addr Dec Addr
P6.20 Over-Current Stall Prevention Level During Accel
♦R/W 0614 41557
Range/Units (Format: 16-bit unsigned) Default
If P6�34 = VT (light duty): 0~130% of drive rated current
If P6�34 = CT (normal duty): 0~160% of drive rated current
00 = Disable
VT: 120
CT: 150
Light Duty (Variable Torque) or Normal Duty (Constant Torque) will be automatically selected
depending on the setting chosen in P6.34.
If the motor load is too large or drive acceleration time is too short, GS4 drive output current may
increase abruptly during acceleration resulting in possible motor damage or fault protection
functions (OL or OC). This parameter is used to prevent this situation.
During acceleration, the GS4 drive output current may increase abruptly and exceed the value
specified by P6.20 due to rapid acceleration or excessive load on the motor. When this function
is enabled, the GS4 drive will stop accelerating and keep the output frequency constant until the
current drops below the maximum value.
When the Over-current Stall Prevention is enabled, drive acceleration time can be greater than the
system acceleration time.
If there is any problem with acceleration time, refer to the following items to solve it:
•
1� Increase the acceleration time to a suitable level�
•
2� Set P6�13 Optimal Acceleration/Deceleration Setting, to 1, 3 or 4�
P6.20
Over-current Stall Prevention
During Acceleration
Time
Setting frequency
Output frequency
Original setting of acceleration time
Actual acceleration time when over-current
stall prevention is enabled
Over-current Stall prevention during
acceleration, frequency held
Related parameters: P6.34 VT/CT Duty Selection, P1.01 Accel Time 1, P1.03 Accel Time 2, P1.05
Accel Time 3, P1.07 Accel Time 4, P6.13 Optimal Acceleration/Deceleration
Setting, any multi-function output.
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