Yaskawa GPD503 Drive - Manual (Page 81)

2.29 STALL PREVENTION
Sn-10: Protective Characteristics Data: — X X X 0 = Stall prevention enabled
Select 1 (Stall Prevention) during acceleration
— X X X 1 = Stall prevention disabled
The stall prevention characteristics during acceleration
determine whether stall prevention is
— X X 0 X = Stall prevention enabled
enabled or disabled during the various
during deceleration
operating modes, as well as selecting
— X X 1 X = Stall prevention disabled
the decel rate during stall prevention.
during deceleration
— X 0 X X = Stall prevention enabled
during operation at
set frequency
— X 1 X X = Stall prevention disabled
during operation at
set frequency
— 0 X X X = Decel time during stall
prevention set by bn-02
— 1 X X X = Decel time during stall
prevention set by bn-04
Cn-28: Stall Prevention Level During Factory setting: 170 %
Acceleration (Constant Torque Region)
Range: 30 to 200 %
Cn-29: Stall Prevention Limit During Factory setting: 50 %
Acceleration (Constant HP Region)
Range: 30 to 200 %
The stall prevention during acceleration extends the acceleration rate according to the
load status with respect to the level programmed into Cn-28 or Cn-29 (based on GPD 503
rated current; see Table A3-1) and protects the motor from stalling during acceleration.
Cn-30: Stall Prevention Level During Operation Factory setting: 160 %
at Set Frequency
Range: 30 to 200 %
During operation while the speed is constant, if the GPD 503 output current exceeds the
stall prevention level set into Cn-30, the output frequency is reduced to a level to prevent
motor stalling. If the output current returns to a value lower than Cn-30, the output
frequency returns to its previous level.
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