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Optidrive P2 Elevator User Guide V2.30
Comfort Optimisation
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Speed Loop Gains adjustment for travel.
The optimum method for tuning the speed loop gains is to utilise the PC software Oscilloscope function.
Tuning of the Speed Loop Gains should be performed with varying load conditions (i.e. No load & Full load).
In general the run speed gains should be adjusted as follows:
1.
Increase the Proportional Gain (P4-03) to achieve the required travel comfort (No speed overshoot when reaching high speed), the
upper limitation of the setting will normally show as vibration/Speed Oscillations/Motor noise.
2.
Decrease the Integral Gain (P4-04) to achieve the required travel comfort, the lower limitation will normally show as speed
instability/vibration.
The diagram below shows a typical scenario showing how speed overshoot at the end of the acceleration ramp and speed oscillation during
floor approach was solved:
3.
If it is found that good travel comfort can be achieved at high speed but not during low speed/levelling then the low speed gains
P4-15 and P4-16 should be utilised.
Rollback Gain adjustment.
If rollback is present during starting (Most common on Gearless motors) then P7-13 Rollback Control gain can be utilised.
It is recommended that the rollback gain parameter is adjusted in the worst case situation e.g. elevator car is full and is called upwards and
when the elevator car is empty and called downwards.
To reduce the amount of rollback:
1.
Increase P7-13 Rollback Control Gain until the point where rollback is no longer present, the limit of this setting will in generally show
as vibration.
2.
If P7-13 has been increased to the maximum point without vibration but there is still rollback present then increase the brake release
time (P3-07).
3.
If both P7-13 and P3-07 have been increased and there is still rollback try setting P7-08 Motor Auto-Pre torque to a 1 (this setting will
also reduce the noise during the operation of the rollback function)
The diagram below shows a typical scenario showing how rollback was solved.
P7-13 =0
P7-13 =100
P-Gain =50/I-gain = 0.050
P-Gain =100/I-gain = 0.030
