PowerFlex Digital DC Drive User Manual - Publication 20P-UM001C-EN-P - July 2008
Drive Start Up 2-15
4. Access the “Dynamic Control” file and press Enter.
5. Access the “Ramp Rates” group and configure the following
parameters:
❏ Par 660 [Accel Time 1] - Set the desired acceleration ramp
time.
❏ Par 662 [Decel Time 1] - Set the desired deceleration ramp
time.
11. Tune the Speed Regulator:
The speed regulator auto tuning test detects the total inertia value of the
motor shaft (in Kg-m
2
), the friction value (in N-m) and the calculation of the
proportional (P) and integral (I) gains of the speed regulator.
Important:The test is carried out by using the torque limit value set in
the Par 1048 [Autotune Cur Lim] (recommended value =
20%). The torque reference is applied via a step reference
(without a ramp); therefore there must not be any
“backlash” in the mechanical transmission and it must be
compatible with those operations using the torque limit
value set in the Par 1048 [Autotune Cur Lim]. You can
modify the torque limit value via this parameter.
Important:In applications where the system total inertia value is very
high, it is necessary to increase the value of Par 1048
[Autotune Cur Lim] in order to avoid “Time out” errors.
The speed regulator auto tuning test of the speed loop is not
suitable for drives used in “elevator” and/or lifting system
applications.
1. While still in the “Autotune” group, configure the motor shaft
rotation direction via Par 1029 [Speed Tune Dir]; 1 “Forward” =
clockwise or 2 “Reverse” = counter-clockwise, with reference to
the motor commutator end.
2. Select the Par 1027 [Spd Reg Autotune], enter “1” and press Enter.
!
ATTENTION: This test requires the free rotation of the
motor shaft combined with the load. The auto tuning test
of the speed loop cannot be carried out on machines with
a limited stroke.
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