478
E300 Design Guide
Issue Number: 1
10.6.2 Control loop gains
During the deceleration and stopping of the Elevator there are both Run speed and current control loop gains available along with a current loop filter.
The position feedback filter available is active during the complete travel and if required this should be adjusted to suit the start, travel and stop.
Table 10-7 Stop optimization parameters
10.7 Brake control optimization
Optimization of the brake control can be carried out adjusting the brake release apply times along with the current and frequency thresholds. The
brake release and apply times will vary dependant upon the time taken for the motor energise and dependant upon the brakes mechanical
arrangement and operating times.
Table 10-8 Brake control optimization parameters
Parameter
Setting
Run Speed Loop P Gain
(
I06
)
Run Speed Loop I Gain (
I07
)
Run speed loop gains are optimized to overcome any overshoot during a transition in speed any vibration
during travel. The P gain should be increased to overcome overshoot and reduced to soften the transition
between speeds. The I gain can be reduced to overcome, reduce vibration and acoustic noise.
Recommended (P) = 500 to 1800 (I) = 1000 to 3000
Run Current Loop P Gain
(
I08
)
Run Current Loop I Gain
(
I09
)
High values of current loop P gain (> 150 % of autotune value) can result in motor acoustic noise. Low values
of current control loop gains (< 50 % of autotune value) will result in oscillations and poor ride quality.
Recommended = Autotune values
Run Current Loop Filter
(
I10
)
Used to over come motor acoustic noise and instability due to system induced noise as a result of un-
shielded cables or poor shield and ground terminations.
Recommended = 1.0 to 4.0 ms
Drive Encoder Feedback Filter
(
C09
)
Used to over come motor acoustic noise and instability due to system induced noise as a result of un-
shielded cables or poor shield and ground terminations.
Recommended = 1 to 2 ms
Parameter
Setting
Brake Control Release Delay
(
D04
)
This is the time taken for the brake to fully open during the start prior to starting the travel.
Recommended = 400 to 500 ms
Brake Control: Upper Current
Threshold
(
D06
)
Brake release high current threshold for open loop operation.
Brake Control: Brake Release
Frequency
(
D08
)
Brake release frequency for open loop operation.
Brake Control Apply Delay
(
D05
)
This is the time required for the brake to fully close during the stop prior to disabling the drive.
Recommended = 400 to 500 ms
Brake Control: Lower Current
Threshold
(
D07
)
Brake apply low current threshold for open loop operation
Brake Apply Frequency
(
D09
)
Brake apply frequency for open loop operation
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