User Guide - Eurotherm Ltda

nanodac RECORDER/CONTROLLER: USER GUIDE4.6.2 Setup Menu Parameters (Cont.)Auto/Man AccessMan.Out AccessAs ‘Setpoint Access’ above, but for Auto/manual parameter.As ‘Setpoint Access’ above, but configures the read/write access for the Manual Outputparameter.*Note: ’PB Units’ and ‘Deriv Type’ appear only if at least one of Ch1 Control and Ch2 Control is set to‘PID’, ‘VPU’ or’ VPB’.4.6.3 Tune menu parametersTune R2GTune EnableLow OutputHigh OutputStateStageStage TimeAT.R2GDefines the type of relative cooling gain tuning for the loop.‘Standard’ - tunes the relative cooling gain of the loop using the standard R2G tuningalgorithm.‘R2GPD’ - If the process is heavily lagged, this setting should be used.‘Off’ - R2G is not calculated automatically. Enter the value manually as described in sectionB2.4.7 Manual tuning.‘Manual Tuning’.Note: This parameter only appears when both channel 1 and channel 2 are configured(for example, in heat/cool processes).For futher information, refer to section B2.4.6 Relative Cool Gain in Well Lagged Processes.‘On’ initiates autotune. Legend changes to ‘Off’ when autotune is complete. Can beset to ‘Off’ manually, to stop the tuning process.Sets a low limit to be imposed whilst autotune is running. The value must be greaterthan or equal to the ‘Output Low’ value, specified in the Output menu (Section 4.6.6).Sets a high limit to be imposed whilst autotune is running. The value must be less thanor equal to the ‘Output High’ value, specified in the Output menu (Section 4.6.6).Read only display of autotune progress:Off. Autotune not runningReady. Fleeting display. Changes immediately to ‘Running’.Running. Autotune is in progress.Complete. Autotune completed successfully. This is a fleeting display which changesimmediately to ‘Off’.Timeout, TI Limit and R2G Limit are error conditions described in Appendix B sectionB2.4.5. If any of these occurs, tuning is aborted and the PID settings remain unchanged.A read only display showing the progress of the autotune:Settling. Displayed during the first minute whilst loop stability is checked (Appendix B,section B2.4.5)To SP. Heating or cooling switched on.Wait min. Power output off.Wait max. Power output on.Timeout, TI Limit and R2G Limit are error conditions described in Appendix B sectionB2.4.5.Time into the current stage of the autotune process. 0 to 99999 seconds.Autotune at R2G. ‘Yes’ means that the control loop uses the R2G value calculated byautotune. ‘No’ causes the loop to use the R2G value entered by the user (PID menu)calculated as described in Appendix B section B2.4.5.Page 100HA030554Issue 7 Nov 12