Chapter 3 – Function Settings
39
3) V/F + PG control
If FU2-39 [control mode] is set to V/F with PG (encoder) feedback using SUB-B board, the control type is automatically
changed to
V/F + PG
. The following parameters should be set accordingly to enable PG feedback using SUB-B board.
Parameter Name
Code
Description
Usage of Pulse Input
Signal
EXT -12
Defines the use of pulse input signal with SUB-B
mounted. This parameter should be set to 1 {Feed-back}.
Pulse Signal Input
Selection
EXT -15
Three types of input signal settable;
(A+B), A, -(A+B)
Encoder Pulse
Number
EXT -16
Defines the number of encoders of the motor.
P-Gain for ‘Sub-B’
I-Gain for ‘Sub-B’
EXT -22, EXT -23
PI gains for PI controller during PG operation
Slip Frequency for
‘Sub-B’ Board
EXT -24
Set as a percent of FU2-32 [Rated Motor Slip].
4) Slip compensation
Operation is done via Slip compensation if FU2-39 is set to 1 {Slip compen}. This control keeps motor speed constant
regardless of load change.
5) Auto-tuning of motor constant
This parameter enables auto-tuning of the motor constants. If set to 1 {All mode}, tuning type varies according to what
control mode is set in [FU2-39]. Auto-tuning can be done in two ways – one is motor non-rotation mode, the other is
motor rotation mode.
①
Auto-tuning by non-rotation mode: Rs+Lsigma
②
Auto-tuning by rotation mode: All, Enc Test, Tr
Before performing Auto-tuning, set motor rating, motor parameter in common setting and select the desired control
mode in
FU2-39 [control mode selection]. However, when auto-tuning parameters related to encoder, detail functions
settings of vector control should be pre-defined. If Enc Test, Tr and control mode are set to vector control,
Sub-B board
should be mounted.
Parameter Name
Code
Description
Auto-tuning
FU2-40
No, All, Rs+Lsigma, Enc Test, Tr
Parameter value
display
FU2-34,
FU2-41 ~ 44
Tuned value monitoring
(No-load current, stator/rotor resistance, leakage
inductance, rotor filter time constant)
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