6
CONTROL MODES AND FEATURES
Set Point
This is the value to which the unit controls the output of a variable transformer. To enter a
set point, press the “D” key until the display says “A.”, on the left side, Enter a set point and
then press “E”.
Dead Band
This is the tolerance around the set point to which the unit will keep the variable
transformer. A dead band of 10 volts means ±5 volts around the set point. To enter a dead
band, press the “D” key until the display says “Ad” on the left side. Enter a dead band in the
form XX.X volts and then press “E”.
“A”
Phases A, B & C will all be controlled by the A phase control parameters (set point and
dead band). To enter this mode, press the “D” key repeatedly until “A” appears on the
display and then press the “E” key.
“AbC”
Phases A, B & C will be individually controlled by their respective control parameters (set
point and dead band). To enter this mode, press the “D” key repeatedly until “AbC” appears
on the display and then press the “E” key.
“bPASS”
Phases A, B, & C will be controlled to a set point equal to the voltage measured on channel
D. The dead band will be set at 1.0V. While in this mode, the display will slowly step
through the instantaneous voltage readings of each phase (A, B, C & D). What is displayed
is not the instantaneous voltage; but instead the difference between the measured voltage
on “D” phase and the set point for the phase that the display is currently showing. To enter
this mode, press the “D” key repeatedly until “bPASS” appears on the display and then
press the “E” key.
“F 50”
Used for operation on 50Hz power. To set the unit for 50Hz operation, press the “D” key
repeatedly until “F 50” appears on the display and then press the “E” key.
“F 60”
Used for operation on 60Hz power. To set the unit for 60Hz operation, press the “D” key
repeatedly until “F 60” appears on the display and then press the “E” key.
“HI XX”
Used for operation with high speed motors (motor speeds less than 10 seconds). XX is a 2
digit number entered from the keypad representing the voltage point above or below the
set point at which slow speed pulsing begins. When the instantaneous voltage is
approaching the set point and reaches this value, the motor transitions from moving
continuously to moving in pulses in an effort to prevent an overshoot of the set point. To
set the unit for a high speed motor, press the “D” key repeatedly until “HI” appears on the
left side of the display; and then enter a 1 or 2 digit numerical value up to 25 representing
volts. Press the ”E” key.
“LO XX”
Used for operation with low speed motors (motor speeds greater than 10 seconds). The
explanation on why this is needed can be read in the explanation for “HI XX”. To set the
unit for a low speed motor, press the “D” key repeatedly until ‘LO” appears on the left side
of the display; and then enter up to a 1 or 2 digit numerical value up to 25 representing
volts. Press the “E” key.
Содержание FRM2000-1
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