128
Displays the actual motor speed in rpm measured from the motor
encoder .
Actual motor speed
Actual elevator speed
Display of the car speed in ft/min; only when the encoder is
connected.
Display of the actual inverter load in %. 100% equals rated load of
the inverter.
Inverter load
Displays the motor set speed in rpm, calculated from the system
data.
Motor command speed
This is a calculated value. The car speed should always be veri ed
with an independent measuring device.
Actual motor speed should always be the same sign (polarity) as
LF.88 and within 20 rpm. Otherwise there is a problem with the
encoder, the encoder cable, or the setting of parameters LF.28.
To verify the encoder operation with induction motors, run the
elevator drive in open loop (LF.30=0), set the inspection speed
(LF.43) to 50% of contract speed and run the car empty up. The
actual motor rpm value displayed in LF.89 should be nearly equal
to the value displayed in LF.88. If the value in LF.89 varies by
more than +/- 10 rpm or the value is greater or less than LF.88
by more than 20 rpm, there is a problem with either the encoder
or the encoder cable.
i
Diagnostic Parameters
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