Manual - Famco

Chapter 3 – Function Settings3) V/F + PG controlIf FU2-39 [control mode] is set to V/F with PG (encoder) feedback using SUB-B board, the control type is automaticallychanged to V/F + PG. The following parameters should be set accordingly to enable PG feedback using SUB-B board.Parameter Name Code DescriptionUsage of Pulse InputSignalEXT-12Defines the use of pulse input signal with SUB-Bmounted. This parameter should be set to 1 {Feed-back}.Pulse Signal InputSelectionEncoder PulseNumberP-Gain for ‘Sub-B’I-Gain for ‘Sub-B’EXT-15EXT-16EXT-22, EXT-23Three types of input signal settable;(A+B), A, -(A+B)Defines the number of encoders of the motor.PI gains for PI controller during PG operationSlip Frequency for‘Sub-B’ BoardEXT-24Set as a percent of FU2-32 [Rated Motor Slip].4) Slip compensationOperation is done via Slip compensation if FU2-39 is set to 1 {Slip compen}. This control keeps motor speed constantregardless of load change.5) Auto-tuning of motor constantThis parameter enables auto-tuning of the motor constants. If set to 1 {All mode}, tuning type varies according to whatcontrol mode is set in [FU2-39]. Auto-tuning can be done in two ways – one is motor non-rotation mode, the other ismotor rotation mode.1 Auto-tuning by non-rotation mode: Rs+Lsigma2 Auto-tuning by rotation mode: All, Enc Test, TrBefore performing Auto-tuning, set motor rating, motor parameter in common setting and select the desired controlmode in FU2-39 [control mode selection]. However, when auto-tuning parameters related to encoder, detail functionssettings of vector control should be pre-defined. If Enc Test, Tr and control mode are set to vector control, Sub-B boardshould be mounted.Parameter Name Code DescriptionAuto-tuning FU2-40 No, All, Rs+Lsigma, Enc Test, TrParameter valuedisplayFU2-34,FU2-41 ~ 44Tuned value monitoring(No-load current, stator/rotor resistance, leakageinductance, rotor filter time constant)39