Santerno Sinus Penta - Page 47

PROGRAMMING GUIDE
SINUS PENTA
47/486
speed. Possible causes:
- Wrong number of pls/rev of the encoder
-
Wrong power supply of the Encoder (e.g. +5V instead of +24V): check the encoder ratings
and the position of jumpers and DIP-switches for
the encoder supply in the optional encoder
board
- Wrong configuration of the DIP-switches for the encoder selection (push-pull or line-driver
encoder) in the optional encoder board
- No connection to the encoder channel (check wiring)
- At least one Encoder channel is faulty (replace the encoder).
6) Motor tuning
parameters (motor
stopped)
With the ENABLE-A and ENABLE-B commands open, access the AUTOTUNE MENU and set
I073=[1: Motor Tune] and I074=[0: Motor Params]. Press ESC to confirm the new values.
Close the ENABLE-A and ENABLE-B
commands and wait until tune is complete (Warning
“W32 Open Enable” is displayed).
The drive has now computed and saved the following parameter values:
- C022 (stator resistance) through motor measurements
- C023 (leakage inductance) through motor measurements
- If C021=0, a first trial value for no-load current C021 is computed based on the motor
ratings
- C024 (mutual inductance)
- If C025=0, a first trial value for rotor time constant C025
is computed based on the
motor ratings
If alarm “A097 Motor Wires KO“ trips, check the motor wiring. If alarm “A065
Autotune KO”
trips, this means that the ENABLE-A and ENABLE-B commands have opened before autotune
was complete. In that
case, reset the drive sending a command from terminal MDI3, or press
the RESET key in the display/keypad and perform the autotune procedure again.
If the motor can rotate with no connected load, carry out the autotune
procedure for the rotor
time constant and the current loop of the FOC regulator as detailed in step 7a
, otherwise carry
out only the current loop tuning as detailed in step 7b
(in that case, the rotor time constant
C025 is not computed based on the motor measurements).
7a) Autotune of the
rotor time constant
and current and flux
loops (rotor free)
CAUTION:
This type of tuning requires that the motor is free to rotate with no
connected load. During autotune, current is first applied to the motor when the rotor is not
running, then the motor is operated to run at approx. 70% of its rated speed.
If the motor can rotate with no connected load, with the ENABLE-A and ENABLE-B commands
open, access the AUTOTUNE MENU and set I073= [1: Motor Tune] e I074= [
2: Control YES
rot]. Press ESC to confirm the new values.
Close the ENABLE-A and ENABLE-B
commands and wait until tune is complete (Warning
“W32 Open Enable” is displayed).
The drive has now computed and saved the following parameter values:
- C025 (rotor time constant) through motor measurements
- P155 (proportional gain of the current control) and P156
(integral time of the current
control) through motor measurements.
- P158 (proportional gain of the flux control) and P159
(integral time of the flux control)
based on the rotor time constant.
If alarm “A065 Autotune KO” trips, this means that the ENABLE-A and ENABLE-B commands
have opened before autotune was complete or the autotune algorithm has failed within the
preset timeout. In that case, reset the drive s
ending a command from terminal MDI3, or press
the RESET key in the display/keypad and perform the autotune procedure again.
NOTE: If autotune has not been interrupted by opening the ENABLE-A and
ENABLE-B commands, decrease no-load current value C021 by 5%
before performing the
autotune procedure again.
7b) Autotune of the
current and flux
loops (motor
stopped)
If the motor cannot rotate with any connected load, it is not possible to estimate the rotor time
constant by way of the autotune procedure, therefore, only the VTC current loop is tuned.
With the ENABLE-A and ENABLE-B commands open, access the AUTOTUNE MENU
and set
I073= [1: Motor Tune] and I074= [1: Control NO rot]. Press ESC to confirm the new changes.