Installation 4-34AC30 series Variable Speed InverterAPPLICATION 4: PID CONTROLANIN 01 (X11/01)ANIN 02 (X11/02) RAMP0486 Acceleration TimePROCESS SETPOINTPROCESS FEEDBACKCURRENT LIMITV/F SHAPINGCT VTVF PWM CONTROLI FDBKFVFV0484 Seq Stop MethodDIGIN 01 (X13/02)DIGIN 02 (X13/03)DIGIN 03 (X13/04)DIGIN 04 (X12/01)DIGIN 05 (X12/02)DIGIN 06 (X12/03)DIGIN 07 (X12/02) SEQUENCING LOGICRUNPID INTEGRAL DEFEATNOT STOPNOT COAST STOPNOT QUICKSTOPTRIP RESETPID ENABLE0422 Vhz Shape0457 Base Frequency0447 Fixed Boost0455 Rated Motor Current ANOUT 01 (X11/03)ANOUT 02 (X11/04)SPEED DEMANDMOTOR CURRENTApplication 4:“Process PID”EASY TUNING FOR SETPOINT/FEEDBACKCONTROL APPLICATIONS REGULATINGVOLUME OR PRESSURE, SUCH AS AIRHANDLING OR PUMPINGSpeedSetpointPressure or Volume FeedbackTransducerPID CONTROL1928 Proportional Gain1929 Integral TC1930 Derivative TC1931 Output Filter TC1932 Output Pos Limit1933 Output Neg Limit1934 Output ScalingMIN /MAX SPEED1264 Ref Min Speed Clamp1265 Ref Max Speed Clamp0487 Deceleration Time0504 Stop Ramp Time0508 Quickstop Ramp TimeFEEDBACKSRUNNINGNOTTRIPPEDRELAY 01 (X14/01)(X14/02)RELAY 02 (X14/03)(X14/04)RELAY 11 (X23/01)(X23/02)if AC30VRequires IO Option7004-01-00RELAY 12if AC30VRequires IO Option7004-01-00OROR(X23/03)(X23/04)PID Control ApplicationA simple application using a Proportional-Integral-Derivative 3-term controller. By default the setpoint is taken from AIN1, with feedback signalfrom the process on AIN2, scaling parameter 1939 swaps the routing of AIN1 & 2. The scale and offset features of the analogue input blocks maybe used to correctly scale these signals. The difference between these two signals is taken as the PID error. The output of the PID block is thenused as the inverter setpoint.
