iii
Parameter
Description
Default
Units
Suggested Adjustment
INERTIA
System inertia
2.00
sec
Determines the system inertia in terms
of the time it takes the elevator to
accelerate to contract speed. If the car
is light, the value will be smaller than the
default and vice versa if the car is
heavy.
ENCODER PULSES
Encoder counts per revolution
1024
PPR
Obtain the Encoder PPR from the
encoder nameplate and enter in this
parameter.
MTR TORQUE LIMIT
Motoring Torque Limit. Units in percent of
rated torque. Note: The Torque Limit LED
will be lit once the limit defined by this
parameter is reached.
200.0
%
Determines the maximum torque
allowed when in the motoring mode.
This is generally left at the default
setting
GAIN REDUCE MULT
Percentage of response of the speed
regulator used when in the low gain mode
100
%
When the RESPONSE is high, the
resonant characteristics of the ropes
can cause car vibration. This parameter
determines the gain to be used at higher
speeds.
GAIN CHNG LEVEL
Speed level to change to low gain mode
(only with internal gain switch)
100.0
% rated
speed
Determines the speed threshold at
which the gain specified by the GAIN
REDUCE MULT is effective.
Table 3 CL: Important parameters in A1 menu to set/check when setting up a drive in closed-loop
Power Convert A4
Parameter
Description
Default
Units
Suggested Adjustment
INPUT L-L VOLTS
Nominal line-line AC
input Voltage, RMS
0
Volts
Adjust to match the voltage across R, S, and T of the drive.
The drive uses this value for its undervoltage alarm and fault
detection circuit
UV ALARM LEVEL
Voltage level for
undervoltage alarm
90
%
nominal
dc bus
Set to 80%
UV FAULT LEVEL
Voltage level for
undervoltage fault
80
%
nominal
dc bus
Set to 70 %
PWM FREQUENCY
Carrier frequency
10.0
kHz
It should not be necessary to change this value from 10kHz
(8kHz for 200% overload). However it can be useful to
reduce this frequency to try to determine if a vibration is
electrically induced or otherwise
Table 4 CL: Important parameters in A4 menu to set/check when setting up a drive
in closed-loop
