Micromod MOD: Modcell 2050R Users Guide Manuale Utente Pagina 161

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IB-23C650
TUNING
Figure 17. Process Recovery Cycle with Optimum
Response Settings
Increasing the gain setting increases cycle B relative to cycle A. If the
controller has gain response only, no further adjustment is required. If the
controller has two or three responses, proceed to Step 7.
7. Measure the period (P) of oscillation in minutes. The period is the time
required for one complete cycle.
8. Calculate I (integral) and D (derivative) values as follows:
a. Controller with P and I responses:
I = P (Minutes)
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