Rockwell Automation 1336S Plus FRN 1.xx-5.xx - Manual (Page 76)

4–12 Start-Up
or
or
or
C. Press the Increment/Decrement keys
until “Flux Current” is displayed. Start
the drive and record this value. Stop
the drive.
D. Press the Increment/Decrement keys to
display “Freq Command.” Adjust the
speed source for the drive to zero Hz.
E. Press the Increment (or Decrement)
key to display “Output Voltage.” Start
the drive and record the value.
F. Stop the drive.
G. Program the values recorded above
into the following parameters.
[Flux Amps Ref] = [Flux Current] at 45 Hz.
[IR Drop Volts] = [Output Voltage] at zero Hz.
Important: Some motors (i.e. 6 pole,
special, etc.) may be particularly sensitive
to the adjustment of [IR Drop Volts]. If this
tuning procedure does not give the desired
performance, adjust [IR Drop Volts]
up/down, 1 or 2 volts until desired
response is achieved.
Output Voltage
0 Vlts
Flux Current = Amps
Output Voltage at 0 Hz = volts
Freq Command
0 Hz
Flux Current
1 Amp
Adjusting Flux Up Time
23. On larger motors (37 kW/50 HP, typical)
additional acceleration performance can be
gained by adjusting [Flux Up Time]. This
parameter determines the amount of time
that the drive will inject current at [Current
Limit] levels before acceleration begins.
This pre-acceleration time builds flux in
the motor to allow for optimum
acceleration, and may result in shorter
overall acceleration. If better performance
is required, adjust [Flux Up Time]. Begin
with 0.2 seconds (default is zero) and
increase as necessary.
For the typical steps involved when
programming, refer to step 20.
Tuning [Slip Comp Gain]
24. To adjust the recovery response to load
changes [Slip Comp Gain] can be
increased. However, increasing the gain
value too high may cause system
instability. The factory default value is set
to minimum. Fine adjustment will require
operation with a load.
Slip Comp Gain
1