102 Functional description CG Drives & Automation 01-7491-01r0
Encoder Speed [22D]
Only visible if the Encoder option board is installed and
added in menus 1x0. This parameter shows the measured
motor speed. To check if the encoder is correctly installed,
set Encoder Feedback [22B] to Off, run the AC drive at any
speed and compare with the value in this menu. The value
in this menu [22D] should be about the same as the motor
speed [230]. If you get the wrong sign for the value, swap
encoder input A and B.
Motor PWM [22E]
Menus for advanced setup of motor modulation properties
PWM = Pulse Width Modulation).
PWM Fswitch [22E1]
Set the PWM switching frequency of the AC drive.
* Maximum is 8 kHz if [222] Motor freq > 400 Hz and if
< 400 Hz max remains at 6 kHz.
PWM Mode [22E2]
PWM Random [22E3]
Udc filter [22E4]
Activating the Udc filter makes the drive less responsive to
fast Udc changes. This can be useful to improve system
stability when connected to a weak power grid but may
reduce the dynamics of motor control.
22D Enc Speed
Unit: 0rpm
Resolution: speed measured via the encoder
NOTE: If accessed via communication, the signal is
unreliable at speeds outside -32768 ... 32767.
Note: Menus [22E1] - [22E3] are only visible if [22A] is
set to “Advanced”.
22E1 PWM Fswitch
Default:
3000 Hz
(2 kHz for models 48-293/295 and
48-365)
Range 1.50 - 6.00kHz *
Resolution 0.01kHz
22E2 PWM Mode
Default: Standard
Standard 0 Standard
Sine Filt 1
Sine Filter mode for use with output Sine
Filters
NOTE: Switching frequency is fixed when “Sine Filt”
is selected. This means that it is not possible to
control the switching frequency based on
temperature.
22E3 PWM Random
Default: Off
Off 0 Random modulation is Off.
On 1
Random modulation is active. Random
frequency variation range is ± 1/8 of level
set in [E22E1].
22E4 Udc filter
Default: Off
Off 0 The Udc filter is not active.
On 1 The Udc filter is active.
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