D-79
Programming
AC890PX AC Drive
If not, apply a compensation using the ELEC POS OFFSET parameter. If necessary, repeat steps 6 and 7 until an error
of only 1° to 5° is achieved.
Examples:
In U phase (90°), if ELEC POS = 20° then ELEC POS OFFSET must be set to 70° to get a value of 90° for ELEC POS.
In U phase (90°), if ELEC POS = -160° then ELEC POS OFFSET must be set to –110° ( +250° ) to get a value of 90°
for ELEC POS. 90° is equivalent to –270°, which explains the value of –110° : -270° = -160° + (-110°).
10.
Verify the correct value of ELEC POS parameter and set POLARISATION = DISABLE, POLAR START = FALSE.
This function could also be used to verify the correct connection of the motor phase (correct succession of the 3 phases) by :
1.
Polarise the motor on the U phase with a low current, typically 20 to 30%, and a ramp value of 1 second.
2.
Change the phase to V, then W, etc. using the MOTOR PHASE parameter and apply torque to the motor:
If the motor is rotating in a clockwise direction, looking to the front shaft of the motor, then the motor phases
are connected correctly. (With the encoder correctly wired, the encoder position will increment when the motor
turns in a clockwise way looking to the front shaft of the motor)
If the motor is rotating in a counter clockwise direction, looking to the front shaft of the motor, two of the
motor phases must be inverted, for example U and V phases.
Summary of Contents for AC890PX Series
Page 17: ...2 5 Product Overview AC890PX AC Drive 890PX bottom wire entry ...
Page 144: ...The Keypad 7 9 AC890PX AC Drive The Menu System Map ...
Page 145: ...7 10 The Keypad AC890PX AC Drive The Menu System Map continued ...
Page 328: ...Programming D 88 AC890PX AC Drive Functional Description ...
Page 386: ...Programming D 146 AC890PX AC Drive Setpoint Drive Frequency Frequency 1 Frequency 2 ...