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70 Program features
Settings
Parameter group
).
Diagnostics
(page
(page
) and
(page
).
Scalar motor control
It is possible to select scalar control as the motor control method instead of Direct
Torque Control (DTC). In scalar control mode, the drive is controlled with a frequency
reference. However, the outstanding performance of DTC is not achieved in scalar
control.
It is recommended to activate the scalar motor control mode in the following
situations:
• In multimotor drives: 1) if the load is not equally shared between the motors, 2) if
the motors are of different sizes, or 3) if the motors are going to be changed after
motor identification (ID run)
• If the nominal current of the motor is less than 1/6 of the nominal output current of
the drive
• If the drive is used without a motor connected (for example, for test purposes).
In scalar control, some standard features are not available.
Settings
Parameter
(page
).
IR compensation for a scalar controlled drive
IR compensation is active only when
the motor control mode is scalar. When
IR compensation is activated, the drive
gives an extra voltage boost to the
motor at low speeds. IR compensation
is useful in applications that require a
high break-away torque.
In Direct Torque Control (DTC), no IR
compensation is possible or needed.
Settings
Parameter
(page
).
f
(Hz)
Motor voltage
No compensation
IR Compensation
Summary of Contents for ACQ810
Page 1: ...ABB industrial drives Firmware manual Standard pump control program for ACQ810 drives ...
Page 4: ......
Page 14: ...14 About the manual ...
Page 56: ...56 Control locations ...
Page 97: ...Application macros 97 ...
Page 98: ...98 Application macros ...
Page 100: ...100 Application macros ...
Page 101: ...Application macros 101 ...
Page 106: ...106 Application macros 75 01 Operation mode Multipump 76 01 Enable MF comm Yes ...
Page 356: ...356 Control through the embedded fieldbus interface ...
Page 366: ...366 Control through a fieldbus adapter ...
Page 374: ...374 Control block diagrams ...