93010350.EN_A_Junior 4.0 User
Manual_240828_v1.0 - VVVF
ANNEX V: Rollback control and ride comfort
When the Playboard controller is applied to installations equipped with closed loop gearless machines,
comfort and precision can be optimized thus avoiding undesired effects such as rollback (typical of lifts
with unbalanced load).
The following parameters can be adjusted to achieve optimal setting for your installation. It is suggested
to follow the procedure from start to end in the proposed sequence.
Starting phase adjustments
Adjust the following Parameters to compensate for other undesired effects
Notes: L65 specifies whether to enable or disable the unbalanced load compensation (Rollback control). By default,
it is set to 1 (Rollback control active). Speed is kept at zero when brakes are released to avoid rollback effect.
Set value between 0,7 and 0,8 then
increase to soften start phase ramp
Important: In “Positioning” Menu :
Delay DIR-BRK <= 0,2 s
Delay BRK-S > H64
RBC Proportional Gain (P constant)
(specifies the P constant of the Automatic
Speed Regulator to be used during RBC
calculation time)
Motor overshoots: increase value by 0,25
Vibrations: decrease value by 0,25
RBC Integral Time (I constant)
(specifies the I constant of the Automatic
Speed Regulator to be used during RBC
calculation time)
Motor overshoots: decrease value by
0,001
Vibrations: increase value by 0,001
Unbalanced load compensation
(specifies the I constant of the Automatic
Position Regulator to be used during RBC
calculation time)
Motor overshoots: increase value by 0,50
Vibrations: decrease value by 0,50
ON delay time
(specifies the delay time during which the
inverter main circuit is kept activated)
Larger Brakes: decrease value by 0,1
Smaller brakes: increase value by 0,1
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