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.
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