Notes:
Increasing the P constant makes response from machinery faster but may cause overshooting or hunting in motor.
Furthermore, due to resonance of machinery or overamplified noise, machinery or motor may produce vibration
noise.
On the contrary, decreasing the P constant excessively delays response and may cause speed fluctuation in a long
cycle, taking time to stabilize the speed.
“I” times values (L37 and L39) normally do not need to be changed, unless “P” gains are not enough to achieve
optimal comfort. Setting a small “I” Time constant shortens the integration interval, providing a faster response. On
the contrary, setting a large “I” Time constant lengthens it, having less effect on the ASR. This may help in case of
resonance of machinery generating abnormal mechanical noise from the motor or gears.
Use the constants of the gains “P” and the times “I”, at low speed, to make the final adjustment for the stop phase:
Parameter Description Default Suggested Adjustments
Gearless Geared
E16
Deceleration time # 9
(Last deceleration ramp)
1,80 s 1,80 s
Increase value by 0,5 to soften
last ramp (max suggested
value: 3 sec)
H67 Stop Hold Time 1,5 s 1,5 s
Car unable to stay at floor:
increase 0,25
Important: In “Positioning”
Menu :
Delay BRK-DIR <= 2,0 s
Stopping Boost = 1% or 2%
L38 “P” Gain constant at low speed 2 10
Car unable to stay at floor:
increase 0,25
Vibrations: decrease value by
0,25
L39 I” Time I constant at low speed 0,100 s 0,100 s
Car unable to stay at floor:
decrease value by 0,01
Vibrations: increase value by
0,01
L83
Brake Control (OFF delay time)
(specifies the delay time between stop speed
and deactivation of the brake signal)
0,3 s 0,1 s
Larger Brakes: decrease value
by 0,1
Smaller brakes: increase value
by 0,1
Notes: In order to let the inverter perform the stopping phase correctly, make sure that operating contactors open at
least 2 sec after brake contactor. If operating contactors open in advance, a shock on the machine may be heard.
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