Rockwell Automation 20P PowerFlex Digital DC Drive - Manual (Page 94)

94 Rockwell Automation Publication 20P-UM001I-EN-P - February 2013
Chapter 2 Drive Start Up
18. Access the “Field Config” group.
19. 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). Leave set to the default
value if using a permanent magnet motor.
❏ 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. Leave set to the default
value if using a permanent magnet motor.
❏ 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
• 3 “PM External”, external field is created by a permanent magnet
(PM) motor
❏ 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%). Leave set to the default value if using a permanent
magnet motor.
❏ 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. Leave set to the default value if using a permanent
magnet motor.
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. See Field Current Configuration on page
60 .