Scalar Motor Control - ABB ACS850 Manual

Jog Jog
Phase
cmd enable
8-9 x 0
9-10 x 0
10-11 x 0
11-12 x 0
12-13 1 1
13-14 1 1
14-15 1 1
15-16 x 0
Note: Jogging is not operational when the drive start command is on, or if the drive is
in local control.
Note: The ramp shape time is set to zero during jogging.

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)
• If the drive runs a medium-voltage motor through a step-up transformer.
In scalar control, some standard features are not available.
Start
cmd
1 Normal operation overrides the jogging. Drive follows the
speed reference.
0 Drive decelerates to zero speed along the active deceleration
ramp.
0 Drive is stopped.
1 Normal operation overrides the jogging. Drive accelerates to
the speed reference along the active acceleration ramp.
1 Start command overrides the jog enable signal.
0 Drive decelerates to the jogging speed along the
deceleration ramp of the jogging function.
0 Drive runs at the jogging speed.
0 Drive decelerates to zero speed along the deceleration ramp
of the jogging function.
Program features 65
Description