ABB ACSM1 - Page 22

Start-up
22
Enter a small speed reference value (for example 3% of the nominal
motor speed).
Start the motor.
Check that the estimated (1.14 SPEED ESTIMATED) and actual
speed (1.08 ENCODER 1 SPEED / 1.10 ENCODER 2 SPEED) are
equal. If the values differ, check the encoder/resolver parameter
settings.
Hint: If the actual speed (with absolute or pulse encoder) differs form the
reference value by a factor of 2, check the pulse number setting (91.01 SINE
COSINE NR / 93.01 ENC1 PULSE NR / 93.11 ENC2 PULSE NR).
1.14 SPEED
ESTIMATED
1.08 ENCODER 1
SPEED /
1.10 ENCODER 2
SPEED
If the direction of rotation is selected as forward, check that the actual
speed (1.08 ENCODER 1 SPEED / 1.10 ENCODER 2 SPEED) is
positive:
• If the actual direction of the rotation is forward and the actual speed
negative, the phasing of the pulse encoder wires is reversed.
• If the actual direction of the rotation is reverse and the actual speed
negative, the motor cables are incorrectly connected.
Changing the connection:
Disconnect the main power, and wait for 5 minutes for the intermediate circuit
capacitors to discharge. Do the necessary changes. Switch the power on and start the
motor again. Check that the estimated and actual speed values are correct.
• If the direction of rotation is selected as reverse, the actual speed
must be negative.
Note: Resolver autotuning routines should always be performed after
resolver cable connection has been modified. Autotuning routines can
be activated by setting parameter 92.02 EXC SIGNAL AMPL or 92.03
EXC SIGNAL FREQ, and then setting parameter 90.10 ENC PAR
REFRESH to (1) CONFIGURE. If the resolver is used with a
permanent magnet motor, an AUTOPHASING ID run should be
performed as well.
1.08 ENCODER 1
SPEED /
1.10 ENCODER 2
SPEED
Stop the motor.
Set parameter 22.01 SPEED FB SEL to (1) ENC1 SPEED or (2)
ENC2 SPEED.
If the speed feedback cannot be used in motor control: In special
applications parameter 40.06 FORCE OPEN LOOP must be set to
TRUE.
22.01 SPEED FB SEL
Note: Speed filtering needs to be adjusted especially when the
encoder pulse number is small. See section Speed filtering on page
25.