Page 81 of 102
TVL 351
ISSUE 15
Once the shaft is learnt, use the profile adjust screen to configure the slowing distance for deceleration from high
speed.
Note: The reset limits BFR and TFR should be positioned at the same distance from the terminal floors as the
slowing distance. If their positions are closer the lift will fail to slow in time when doing a position correction run
(dive). If their distance is considerably greater than the slowing distance nuisance LTLR trips may be experienced
on a dive run.
The learn run is usually carried out at inspection speed if the panel is a VF drive variant e.g. Bucher ELRV or Algi
system. On a standard hydraulic the learn run may be carried out at high speed (depending on contract speed.)
Optionally on all hydraulic types the learn run can be performed at levelling speed to increase accuracy.
Hydraulic Lift Relevelling / Levelling Setup
On completion of a successful shaft learn it is recommended the following steps are carried out to achieve the
correct relevelling/levelling operation.
Press: Checklist → DZ Stop Distance
Select Check List from Home Screen and carry out the Door Zone Stop Distance procedure.
The value learnt following this procedure should not be greater than 20mm.
Referring to EN81-20: The stopping accuracy of the car shall be ± 10 mm. If, during e.g. loading and unloading
phases, the levelling accuracy of ± 20 mm is exceeded, it shall be corrected to ± 10 mm.
The stopping accuracy and the learnt Door Zone Stop Distance value is dependent upon the control profile of the
hydraulic system after the Ethos Two has removed the low speed signal. Usually the optimal Door Zone Stop
Distance value given a lift speed of 0.63m/s is between 12mm and 15mm.
A note should be made of the Learnt Floor Level Values. Given a two-floor contract, the Top and Bottom floor values
can be read from the Floor Map Screen. (Home Screen → Check List → Commission → Floor Map). It is important
that the Floor Trims for the given floors are zero before noting down the learnt values.
The lift should then be sent to the two floors while monitoring the stopping point using the SE Current Distance
Value which can be found within the Status Screen (Home Screen → Profile → Status). Adjustments can then be
made to the Hydraulic Valve Control settings to target the learnt value if the lift is seen to be overshooting or
stopping short of it.
For example on a Bucher system if the speeds are set correctly, Soft Stop Demand UP (parameter within the
Bucher settings) can be increased if the lift is seen to be overshooting the target value when going up.
Once the lift is stopping at the target value it should be ridden to each floor noting down the error and inputting it into
Floors Trim screen (Home Screen → Check List → Commission → Floor Trim).
The Relevelling performance can then be checked following this setup.
Note: For Software version CSV6.00 onwards the re-levelling performance on Hydraulics can be changed to use a
run-on distance instead of run-on delay time. The re-level run-on distance can be found in Home Screen → Check
List → Commission → Hydraulic Timers. This allows the lift to continue to re-level past the stop distance until the run
on distance is achieved.
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