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Optimization CT MODBUS RTU Technical Data
E300 Design Guide 477
Issue Number: 1
Table 10-5 Travel optimization parameters
10.6 Creep to floor - Stop optimization
The stop ride comfort of the Elevator can be optimized through either the profile settings or by adjustment of the drive’s control loop gains. The stop
profile should firstly be optimized (Run jerk 3, Deceleration rate, Run jerk 4, Creep speed*, Creep stop deceleration rate and Creep stop jerk) prior to
adjustment of the drive’s speed and current control loop gains.
10.6.1 Profile settings
Optimization of the Elevator stopping can be carried out by adjusting the stop S ramp (Run jerk 3), Deceleration rate, end of deceleration S ramp (Run
jerk 4), Creep speed*, Creep stop deceleration rate and Creep stop jerk.
Table 10-6 Stop profile optimization parameters
* V1 Speed Reference (G01) by default, any speed can be selected.
Parameter Setting
Run Speed Loop P (I06)
Run Speed Loop I Gain (I07)
Run speed loop gains are optimized to overcome any overshoot during a transition in speed and 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 increased at constant speed to ensure maximum torque, or reduced to
overcome or 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
Run Jerk 3 (G15)
If the ride comfort is hard at the start of deceleration increase the S ramp which will result in a softer transition.
If the ride comfort is soft decrease the S ramp which will provide a stiffer transition through to deceleration.
Recommended = application specific
Deceleration Rate (G12)
The deceleration is set-up to stop from the operating speed with a good ride quality and to limit the time
required at the Creep speed*. This can be optimized to achieve a higher ride quality.
Recommended = application specific
Run Jerk 4 (G16)
If the ride comfort is hard at the end of deceleration and when reaching the Creep speed* increase the S
ramp which will result in a softer transition. If the ride comfort is soft decrease the S ramp which will provide a
stiffer transition through to Creep speed*.
Recommended = application specific
Creep Speed (V1 Speed Reference
(G01) by default, any speed can be
selected)
Can be reduced to improve floor positioning accuracy or increased to reduce the time operating at Creep
speed* and to reach the floor.
Recommended = application specific
Creep Stop Deceleration Rate (G17)
The Creep stop deceleration is set-up to give a good final stop ride quality.
R
ecomme
nded = application specific
Creep Stop Jerk (G18)
If the final stop at floor is hard increase the S ramp which will result in a softer transition. If the ride comfort is
too soft decrease the S ramp which will provide a stiffer transition to stop.
Recommended = application specific
Motor Torque Ramp Time (D02)
Time to ramp torque down on the motor against the mechanical brake, increase to overcome any acoustic
noise.
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