Despatch LBB 1-23 Owner's Manual

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Despatch LBB 1-23 Owner's Manual Manual pdf 33 page image

LBB Series Oven Owner’s Manual OPERATIONVersion 20 335.4.2. Control Instrument Parameter Programming ModeWarning!Changing program parameters alters the function of the Control.Proceed carefully and fully understand each parameter beforechanging that parameter.Control instrument parameters are set through the Operating and Set-up modes. In mostapplications, it is not necessary to alter the oven settings. The following instructions describe howto access, view and if desired, change the parameters. Once the Operating and Set-up modes areaccessed, SP will start blinking on and off. Table 4 and Table 5 explain the Operating and Set-upMode parameters.The Control Instrument will not allow the display to be altered improperly. The ControlInstrument will automatically exit the Parameter Programming mode if no keys are pressed forabout two (2) minutes.5.4.2.1. Entering Control Instrument Set-up and Configuration ModeTo enter the Operating and Set-up Mode (Figure 4):1. Press for three (3) seconds.2. Press until the desired parameter displays. See Table 4 for more information.3. Press ▲ or ▼ to display the value.4. Use ▲ or ▼ to move to the desired setting.5. Press to enter the value.6. Press and hold for three (3) seconds to return to the display mode.Table 4. Control Instrument Set-up Parameters.Code Name Description SettingsCtLControlModeDetermines whether controller functions as a timeproportional or an on/off control. PIDAt Auto-tuning OFF for PID tuning, ON for controller to tune process OFFP ProportionalBandExpressed in degrees, value determines the band widthon both sides of the setpoint within which the controlprovides proportional control.4(8 if F)*I IntegralTimeExpressed in seconds, value corrects for errors in actualtemperature versus the setpoint15d DerivativeTimeExpressed in seconds, value shows the effect of thederivative time is in direct proportion to the time setting0Ct Cycle Time Expressed in seconds, value shows total time for oneON/OFF cycle of the controller output during theproportional action1FL Input Filter Expressed in seconds. Use this function when the PV mayfluctuate greatly (for example, when an input signalcontains noise)0