PowerFlex Digital DC Drive User Manual - Publication 20P-UM001C-EN-P - July 2008
2-8 Drive Start Up
11. Access the “Field Config” group and configure the following
parameters:
❏ If the motor field power is supplied by an external source, set
Par 497 [Field Reg Enable] = 0 “Disabled”. Otherwise, verify
that this parameter is set to 1 “Enabled” (default).
❏ If you are utilizing field economy when the drive is stopped or
at zero speed, set Par 1407 [Field Econ Delay] to the desired
amount of time to elapse after the drive stops or reaches zero
speed before field economy becomes active (the value set in Par
468 [Min Fld Curr Pct]). The default value is 300 seconds.
❏ Par 469 [Field Mode Sel] - select the desired field mode
(default = 0 “Base Speed”, constant field current):
❍1 “Field Weaken”, field weakening mode
❍2 “External”, power to the field is supplied externally
❏ If you are utilizing field economy at zero speed, set 468 [Min
Fld Curr Pct] to the desired minimum field current for field
economy (default = 30%).
❏ If you are operating the drive in field weakening mode, set Par
456 [Fld Weaken Ratio] = Motor nameplate base speed / Par 45
[Max Ref Speed] x 100.
Important:When operating the drive in field weakening mode, it is
necessary to refer to the CEMF value or to the crossover
data. If the maximum field current is not within 10% of the
maximum value of the internal field converter, configure
the current feedback using DIP switch S14. Refer to Field
Current Resistors on page 1-24.
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