ABB ControlMaster CM10 User Manual page 32

Universal process controllers, 1/8, 1/4 and 1/2 din

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Table of Contents

ControlMaster CM10, CM30 and CM50

Universal process controllers,

...Basic / ...Loop 1 Control

Mode

Autotune

Autotune is a user-activated feature that enables automatic setting of the controller PID parameters using an 'at setpoint'

type algorithm. Autotune changes the controller output and then monitors the process response to calculate the optimum

PID settings. Autotune uses a relay type function with hysteresis that initiates a controlled oscillation in the process. New

PID parameters are calculated and stored in the controller automatically.

Note. To achieve the best results from Autotune, switch the controller to Manual control mode (see page 6) and adjust the

output until the PV is stable (close to the normal setpoint) before initiating Autotune.

and

DIN

Turns the Autotune functionality on or off. When set to On, an Autotune can be started from the

Operator level menus – see page 23.

Note. Autotune is enabled only if the control type is PID – see page 32.

6 Basic Level

IM/CM/B–EN Rev. H

Table of Contents

Controlmaster cm30 Controlmaster cm50Cm10Cm50Cm30