Parameters 97
23.13 Deceleration time 1 Defines the time required for the speed to change from the
speed defined by parameter 46.01 Speed scaling (not from
parameter 30.12 Maximum speed) to zero.
If the speed reference decreases slower than the set
deceleration rate, the motor speed will follow the reference.
If the reference changes faster than the set deceleration rate,
the motor speed will follow the deceleration rate.
If the deceleration rate is set too short, the drive will
automatically prolong the deceleration in order not to exceed
drive torque limits (or not to exceed a safe DC link voltage).
Notes
• Applicable only when 79.40 MPPT reference is disabled. If
parameter MPPT reference is enabled, then the parameter
should be set to it’s default value.
• If a short deceleration time is needed for a high inertia
application, the drive should be equipped with braking
equipment such as a brake chopper and brake resistor.
20.000
0.000…1800.000 s Deceleration time 1. 10 = 1
24
24 Speed reference
conditioning
Speed error calculation; speed error window control
configuration; speed error step.
24.01 Used speed
reference
Displays the ramped and corrected speed reference (before
speed error calculation).
This parameter is read-only.
-
-30000.00…
30000.00 rpm
Speed reference used for speed error calculation. See par.
46.01
24.02 Used speed
feedback
Displays the speed feedback used for speed error calculation.
This parameter is read-only.
-
-30000.00…
30000.00 rpm
Speed feedback used for speed error calculation. See par.
46.01
24.03 Speed error filtered Displays the filtered speed error. This parameter is read-only. -
-30000.0… 30000.0
rpm
Filtered speed error. See par.
46.01
24.12 Speed error filter
time
Defines the time constant of the speed error low-pass filter.
If the used speed reference changes rapidly, the possible
interferences in the speed measurement can be filtered with
the speed error filter. Reducing the ripple with this filter may
cause speed controller tuning problems. A long filter time
constant and fast acceleration time contradict one another. A
very long filter time results in unstable control.
0 ms
0…10000 ms Speed error filtering time constant. 0 = filtering disabled. 1 = 1 ms
25
25 Speed control
Speed controller settings.
25.01 Torque reference
speed control
Shows speed controller output that is transferred to the
torque controller. This parameter is read-only.
0.0
-1600.0…1600.0% Limited speed controller output torque. 10 = 1
No. Name/Value Description Def/FbEq16
ACQ80 FW.book Page 97 Thursday, February 14, 2019 11:33 AM
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