50 Program features
WARNING! If jogging is enabled and activated while the start command is on,
jogging will activate as soon as the start command switches off.
• If both jogging functions are activated, the one that was activated first has priority.
• Jogging uses the speed control mode.
• Ramp shape times (parameters 23.16…23.19) do not apply to jogging
acceleration/deceleration ramps.
• The inching functions activated through fieldbus (see 06.01 Main control word,
bits 8…9) use the references and ramp times defined for jogging, but do not
require the jog enable signal.
Settings
Parameters 20.25 Jogging enable (page 142), 20.26 Jogging 1 start source (page
142), 20.27 Jogging 2 start source (page 143), 22.42 Jogging 1 ref (page 153), 22.43
Jogging 2 ref (page 153), 23.20 Acc time jogging (page 160) and 23.21 Dec time
jogging (page 160).
Scalar motor control
It is possible to select scalar control as the motor control method instead of vector
control. In scalar control mode, the drive is controlled with a speed or frequency
reference. However, the outstanding performance of vector control is not achieved in
scalar control.
It is recommended to activate scalar motor control mode
• 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, or
• in multimotor drives, if
• the load is not equally shared between the motors,
• the motors are of different sizes, or
• the motors are going to be changed after motor identification (ID run)
In scalar control, some standard features are not available.
See also section Operating modes of the drive (page 22).
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