MMC Function Block Tuning Procedure
Follow these steps to configure the tuner.
To configure the tuner
- Put all three CV parameters into Manual mode.
- Set the appropriate AtuneStart parameter.The tuner starts collecting PV and CV data for noise calculation.
- After collecting 60 samples (60*DeltaT) period, the tuner adds StepSize to the CV.After successfully collecting the PV data as a result of the CV step change, the CV assumes its value before the step change and the AtuneStatus, GainTuned, TCTuned, DTTuned, and RespTCTuned parameters are updated.
- Set the appropriate AtuneUseModel parameter to copy the tuned parameters to the model parametersThe function block then resets the AtuneUseModel parameter.After a successful AutoTuneDone, the Atune parameter is set to one (1). Tuning completed successfully.
To identify models and to calculate response time constants for all six CV - PV processes, run the tuner up to three times to obtain CV1 - PV2, CV2 - PV2, and CV3 - PV2 models and tuning, respectively. After each run, two process models are identified: CV - PV1 and CV - PV2 (two process variables respond as a result of one CV step change).
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