73
Encoder Data
Torque units will change depending on which units are set in US02. For
reference, here are the equations to convert between Imperial and Metric
units provided different nameplate information:
Rated Motor Speed
Rated Motor Speed
kW * 7051
HP * 5252
Nm
1.355
lb-ft = = =
Further PM motor data parameters will be determined during the Motor Tune
process, described later.
SETUP OF THE MOTOR DATA IS NOW COMPLETE!
Next, the basic encoder parameters must be entered:
• LE02 - Encoder Pulse Number (ppr)
For absolute encoders, additional parameters may need to be adjusted.
SETUP OF THE ENCODER DATA IS NOW COMPLETE!
Next, the basic machine data must be entered. The machine data determines
a scalar internal to the drive which translates a familiar linear speed (e.g. fpm)
to a rotary speed (e.g. rpm) which the drive uses:
Note: Incorrect Machine Data would cause the elevator to run too fast
or too slow.
The following data would need to be entered:
• LN01 - Sheave Diameter (note the units)
• LN02 - Gear Ratio (x:1)
• LN03 - Roping Ratio (x:1)
If the sheave diameter is not known, it can be measured with a tape measure.
Some sheave manufacturers will show “Minimum Groove Diameter” on a plate
attached to the sheave. This is the diameter to the bottom of the groove, which
is normally about one inch smaller than the actual diameter at which the rope
lies. Therefore, when this dimension is provided, add one inch to it and enter
that value in LN01.
For a gearless job, the Gear Ratio would be 1. If the gear ratio is unknown
for a geared machine, LN05 will calculate an Estimated Gear Ratio from the
motor rated speed, contract speed, roping ratio and sheave diameter. This
value could then be entered as the gear ratio in LN02.
SETUP OF THE MACHINE DATA IS NOW COMPLETE!
4.6. Encoder Data
4.7. Machine Data
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