Section 1General InformationManually Tuning the Series 29M Control 6-5MN1230The next waveform illustrates what happens to the system offset when we apply integralgain. With the addition of integral gain (2.00 Hz), the system offset is reduced to zero.Process FeedbackSetpoint Command(Oscilloscope set to:vertical=1 V/ divisionhorizontal=1.0 sec/divisionProcess Gain Settings:Proportional gain=100Integral gain=2.00 HzManually Tuning the Control In some applications the drive cannot be accurately auto-tuned. In these cases it isnecessary to calculate the values needed to tune the drive and manually enter thesecalculated parameter values.Current Prop Gain Parameter This parameter is located in the Level 1, Brushless Control Block. The CurrentProp Gain parameter is normally auto–tuned when motor inductance is not known.Where auto–tuning can’t be used, the proper manual setting for the proportional gain canbe calculated by:Current PROP Gain 740 x L x AV VACWhere:L = Line to neutral inductance of the motor in mHVAC = Nominal line VoltsA/V = The Amps/Volt scaling of the current feedbackMotor line to neutral inductance can be obtained either from the motor manufacturer or bymeasuring the line–to–line inductance and dividing by two.The A/V scaling for the control can be found in the diagnostic information located in theDISPLAY MODE.For most applications setting the Current Prop Gain parameter to a value of 60 will yieldadequate performance.
