ABB ACS880 ESP, Руководство по прошивке

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Standard programposi features 71
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
See parameters below:
20.25 Jogging enable
20.26 Jogging 1 start source
20.27 Jogging 2 start source
22.42 Jogging 1 ref
22.43 Jogging 2 ref
23.20 Acc time jogging and
23.21 Dec time jogging .

Position latching
The FEN-xx encoder interface modules listed above support position latching.
Position latching stores the position of the motor or machine at the instant a latch
signal, eg. from a limit switch, is received.
Each FEN-xx module has two digital inputs that can be used for latching. Latching
can alternatively be triggered by the Z-pulse signal received from the encoder.
The control program has two position latching functions that can be configured
separately. The stored positions can be read by a PLC and used for position control
when the loop is closed in the PLC. The positions can also be used as initial positions
– see section
Position counter (page 66 ).

Scalar motor control
Scalar control is the motor control method used instead of DTC (Direct Torque
Control). In scalar control mode, the drive is controlled with a speed or frequency
reference. However, the outstanding performance of DTC is not achieved in scalar
control.