3.2.3 Control Structure in Flux Sensorless+_+_130BA053.11Ref.Config. modeP 1-00P 7-20 Process feedback1 sourceP 7-22 Process feedback2 sourceProcessPIDP 4-11 Motor speedlow limit [RPM]P 4-12 Motor speedlow limit [Hz]P 4-14 Motor speedhigh limit [Hz]P 4-13 Motor speedhigh limit [RPM]LowHighRampP 3-** +f max.P 4-19Max. outputfreq.Motorcontroller-f max.SpeedPIDP 7-0*Illustration 3.5 Control Structure in Flux Sensorless Open Loop and Closed Loop ConfigurationsIn Illustration 3.5, 1-01 Motor Control Principle is set to [2] Flux sensorless and 1-00 Configuration Mode is set to [0] Speed openloop. The resulting reference from the reference handling system is fed through the ramp and speed limitations asdetermined by the parameter settings indicated.An estimated speed feedback is generated to the Speed PID to control the output frequency. The Speed PID must be setwith its P,I, and D parameters (parameter group 7-0* Speed PID Ctrl).To use the process PID control for closed loop control of speed or pressure in the controlled application, for example, select[3] Process in 1-00 Configuration Mode. The Process PID parameters are found in parameter group 7-2* Process Ctrl. Feedbackand 7-3* Process PID Ctrl.3.2.4 Control Structure in Flux with Motor Feedback130BA054.11P 3-** P 7-0*P 7-2*+_+_P 7-20 Process feedback1 sourceP 7-22 Process feedback2 sourceP 4-11 Motor speedlow limit (RPM)P 4-12 Motor speedlow limit (Hz)P 4-13 Motor speedhigh limit (RPM)P 4-14 Motor speedhigh limit (Hz)HighLowRef. ProcessPIDSpeedPIDRampP 7-00PID sourceMotorcontroller-f max.+f max.P 4-19Max. outputfreq.P 1-00Config. modeP 1-00Config. modeTorqueIllustration 3.6 Control Structure in Flux with Motor Feedback Configuration (Only Available in FC 302)Product Introduction VLT® AutomationDrive FC 300 Design Guide 90-1200 kWMG34S202 - Rev. 2013-08-19 253 3
