TVC Ethos Two - Page 78

Page 78 of 102
TVL 351
ISSUE 15
Do not change the drive’s maximum switching frequency (#B13) without
consulting the factory. The drive is sized to suit the default of 8kHz.
Installation
a) Check Motor and Encoder wiring is terminated correctly (ref to TVC
Drawings).
Overshoot during
change of speed
E300 Drive Settings
a) Overshoot can occur during operation where there is a change in speed due
to the speed control loop proportional gain being too low. The speed control
loop proportional gain #I06 (Run) should be increased. Too high a value will
cause motor acoustic or instability.
Bump on Stop E300 Drive Setting
a) Increase #D02 Motor Toque Ramp Time by 100ms until bump is no longer
felt. Note: This parameter also affects the start.
Lift not picking up
full load
E300 Drive Setting/Motor Data
a) Check #B16 Symmetrical Current Limit.
Testing – Over Speed Test
To test the lift in an over-speed condition, for testing over speed governors and safety gears follow the procedure
below: Select Over speed Test in the checklist in software version CSV4.01 onwards.
Press: Checklist → Over speed 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 an over speed test.
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 current 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.
Set E01 (Nominal Elevator Speed) to a percentage of the Contract Speed:
Over Speed Value = (Vc x (Vos%/100)) e.g. (1600 mm/s x (115 %/100)) = 1840 mm/s.
This sets the drives contract speed to the over speed value.
The lift can now be run on the test buttons until it reaches the over speed rate.
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 motor can be run above contract speed without sustaining damage, check
with motor manufacturer.
Keep a copy of parameters changed & check that they have reverted back after power off,
before running.
Testing – Buffers, Energy Dissipation Type (at design speed)
Follow the procedure below to test the buffers.