Hardware and Engineering DF6-340-... Frequency ... - Moeller.com.tr

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01/02 AWB8230-1413GB PID controlScaling adjustmentScaling adjustment <strong>and</strong> scaling allow the setpoint <strong>and</strong> actual valueto be displayed <strong>and</strong> the setpoint value to be entered directly in thecorrect physical unit. For this purpose, 100 % of the returnedactual value is taken as a basis. By default, inputs <strong>and</strong> displays arebased on 0 to 100 %.Example: In the first diagram in figure 123, 20 mA of the feedbacksignal correspond to 100 % of the PID internal factor. If forexample the flow rate is currently 60 m 3 /min with a feedbacksignal of 20 mA, the parameter is set to 0.6 (= 60/100) withPNU A075. With PNU d004, the process corrected value can bedisplayed <strong>and</strong> the setpoint value can be entered directly as aprocess corrected quantity.G1G1w [%]PNU F001= 0 – 100 %x4 – 20 mAPNU d001= 0 – 100 %B1w [%]PNU F0010 – 60m 3 /minx4 – 20 mAPNU d0010 – 60m 3 /minB1M3~Factory default setting PNU A075 = 0.6aP1M3~aP1Figure 124: Example for scaling adjustmentw: Setpointx: Returned actual valuea FanSummary of the relevant parametersThe <strong>DF6</strong> frequency inverters use the same parameters for bothfrequency control <strong>and</strong> PID modes. The designations of therespective parameter relate only to frequency control mode, as thismode is used in most cases. When PID mode is used, some of theparameters have other designations.The table below contains an explanation of these parameters forboth frequency control mode <strong>and</strong> PID mode:PNUMeaning of the parameters when used infrequency control modePID moded004 – Indication of the returned actual valueF001 Indication of the output frequency Indication of the setpoint valueA001 Definition of frequency setpoint value Setpoint definitionA011 <strong>Frequency</strong> at minimum setpoint value (units: Hz) Feedback percentage actual value for lower acceptancethreshold (units: %)A012 <strong>Frequency</strong> at maximum setpoint value (units: Hz) Feedback percentage actual value for upper acceptancethreshold (units: %)A013 Minimum setpoint value (units: Hz) Lower acceptance threshold for voltage or current on theactual value input (units: %)A014 Maximum setpoint value (units: Hz) Upper acceptance threshold for voltage or current at theactual value input (units: %)A021 to A035 Fixed frequencies 1 to 15 Digital adjustable setpoint values 1 to 15123
Setting Parameters01/02 AWB8230-1413GBPNUMeaning of the parameters when used infrequency control modePID modeA071 – PID control active/inactiveA072P <strong>com</strong>ponent of the PID controlA073I <strong>com</strong>ponent of the PID controlA074D <strong>com</strong>ponent of the PID controlA075Setpoint factor of the PID controlA076Input actual value signal for PID controlSettings in frequency control modeBefore you use PID mode, you must configure the parameters infrequency control mode. Observe the following two points:Acceleration <strong>and</strong> deceleration rampThe output frequency calculated with the PID algorithm is notimmediately available at the frequency inverter output, as theoutput frequency is affected by the set acceleration <strong>and</strong>deceleration times. Even if, for example, a large D <strong>com</strong>ponent isdefined, the output frequency is significantly influenced by theacceleration <strong>and</strong> deceleration time, <strong>and</strong> this causes unstablecontrol behaviour.To achieve stable behaviour in every PID control range, theacceleration <strong>and</strong> deceleration times should be set as low aspossible.After every acceleration <strong>and</strong> deceleration ramp parameter change,parameters PNU A072, A073 <strong>and</strong> A074 must be rematched.<strong>Frequency</strong> jumps/frequency rangeRegarding the setting of frequency jumps, remember that thefeedback actual value signal must not change during a frequencyjump. If a stable operating point exists within a frequency jumprange, an oscillation between the end values of this range occurs.Configuration of setpoint value <strong>and</strong> actual valueIn PID mode, you must first specify how the setpoint is to bedefined <strong>and</strong> where the actual value is to be supplied. The tablebelow lists the required settings:Actual value inputSetpoint definitionBuilt-in keypadDigitally throughcontrol signalterminals(fixed frequencies)Built-inpotentiometerAnalog voltage atO-LAnalog current atOI-LAnalog voltage(O-L: 0 to 10 V)Analog current(OI-L: 4 to 20 mA)PNU A001 = 02PNU A076 = 01PNU A001 = 02PNU A076 = 01PNU A001 = 00PNU A076 = 01– PNU A001 = 01PNU A076 = 01PNU A001 = 02PNU A076 = 00PNU A001 = 02PNU A076 = 00PNU A001 = 00PNU A076 = 00PNU A001 = 01PNU A076 = 00–The setpoint value <strong>and</strong> the actual value cannot be suppliedthrough the same analog input terminal.Note that the frequency inverter brakes <strong>and</strong> stops according to theset deceleration ramp as soon as a stop signal is issued in PIDoperation.ScalingSet the scaling to the process-corrected physical unit as requiredby your application, for example to flow, pressure or temperature.For a detailed description, a section “Scaling adjustment”,page 123.Setpoint adjustment through digital inputsThe following points must be observed when defining the setpointthrough the digital inputs (4-bit):Assigning the digital inputsThe <strong>DF6</strong> frequency inverters have five programmable digitalinputs. Assign functions FF1 to FF4 to four of the inputs usingPNU C001 to C005 to correspond to inputs 1 to 5 of the inverter.Adjusting the setpoint valuesFirst, select the required number of different setpoints (up to 16)from the table below. Under PNU A021 (corresponding with thefirst setpoint value) to A035 (corresponds to 15th setpoint value),enter the desired setpoint value. PNU A020 <strong>and</strong> F001 correspondto a setpoint value of 0.hIf the setpoints are to be scaled, note that they must beentered as process-corrected quantity values inaccordance with this scaling.124
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About the DF6 <str
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Operating the DF60
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Index01/02 AWB8230-1413GBFlow contr
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Hardware and Engineering DF6-340-... Frequency ... - Moeller.com.tr

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