TVC Ethos Two - Page 79

Page 79 of 102
TVL 351
ISSUE 15
Select Buffer Test in the checklist in software version CSV4.01 onwards.
Press: Checklist → Buffer Test.
If you have an earlier software version follow the procedure below:
Place controller on Emergency Electrical Operation, via the Panel Test buttons.
Move lift to the middle of the shaft.
Stop the lift, make sure you are safe to perform a buffer test / crash into the buffers.
Modify the following parameters in the drive:
Set F39 (Analogue Input 1 Scaling) to the value from the formula below: (Take a note of the existing value, typically
1.06 as this will need to be reset after the test.)
Using the Contract Speed (Vc) and Panel Test Speed (Vpt) in the formula:
New Scaling Value =( (Vc / Vpt) x 1.06) e.g. (1600 mm/s / 250 mm/s) x 1.06 = 6.784.
Set the New Scaling Value in F39.
If different to contract speed - Set E01 (Nominal Elevator Speed) to the buffer design speed (Vb) in mm/s.
Buffer Speed Value = (Vb) e.g. for 1.6m/s lift buffer = 1600 mm/s.
This sets the drives contract speed to the buffer speed value.
Additionally the BFR / TFR (Bottom / Top Floor Reset Limit), DL / UL (Down / Up Terminal Limit), OTL (Final Limits)
may need to be disabled or linked out temporarily.
The lift can now be run on the test buttons until it crashes into the buffers.
Do not save these modified parameters in the drive! A power cycle will restore the drive to the original values.
Note:
This only applies to pattern Ethos Two applications; It is customer’s responsibility to
ensure that the lift can be run into the buffers at speed without sustaining damage.
Keep a copy of parameters changed & check that they have reverted back after power off,
before running. Remove any shorts or disabled limits before performing any further
actions.