Yaskawa GPD503 Drive - Manual (Page 90)

2.34 UP/DOWN FREQUENCY SETTING Continued
2.35 SLIP COMPENSATION DELAY TIME
Cn-35: Slip Compensation Delay Time Factory Setting: 2.0 seconds
Range: 0.0 to 25.5 seconds
Set in increments of 0.1 second. When the output current of the drive becomes equal to
the motor rated current (Cn-09), the output frequency of the drive is compensated for by
the motor rated slip. The amount of frequency compensation is determined by the
following formula. If frequency reference is equal to or smaller than minimum output
frequency (Cn-07), slip compensation is not performed.
bn-08
Amount of output freq. comp. = ––––––––––––––––– x (Output current – Cn-34)
Cn-09 – Cn-34
Where:
Cn-09 = Motor Rated Current
Cn-34 = Motor No-load Slip
bn-08 = Motor Rated Slip
2-51
Changed
FWD RUN
UP
COMMAND
DOWN
COMMAND
UPPER
LIMIT SPEED
LOWER
LIMIT SPEED
OUTPUT
FREQUENCY*
"SPEED AT SET
FREQUENCY"
SIGNAL
* U = UP (Accel) status; D = DOWN (Decel) status; H = HOLD (constant speed) status;
U1 = At Upper Limit Speed; D1 = At Lower Limit Speed
Up/Down Frequency Setting Timing
D1 D D D H H H H H H H U1 U U U D1 D1