Eurotherm 3116 PID Podręcznik Użytkownika Pobierz pdf (Strona 27)

ENG

3116 User Guide Part No. HA028005ENG Issue 2.0 May 04

Mnemonic Scrolling Display and description Range

Full Scale

Low

Bnd

Deviation

Band

dH i

Deviation

High

Full Scale

High

dLo

Deviation

Low

This section applies to control parameters

A.TUNE AUTOTUNE automatically sets the control parameters to match the

process characteristics.

Off

Disable

Enable

PB PROPORTIONAL BAND sets an output which is proportional to the

size of the error signal. Units may be % or display units.

1 to 9999 display units

TI INTEGRAL TIME removes steady state control offsets by ramping the

output up or down in proportion to the amplitude and duration of the

error signal.

Off to 9999 seconds

TD DERIVATIVE TIME determines how strongly the controller will react

to the rate of change in the process value. It is used to prevent

overshoot and undershoot and to restore the PV rapidly if there is a

sudden change in demand.

Off to 9999 seconds

MR MANUAL RESET applies to a PD only controller i.e. the integral term

is turned off. Set this to a value of power output (from +100% heat, to

-100% cool which removes any steady state error between SP and PV.

-100 to 100%

R2G RELATIVE COOL GAIN adjusts the cooling proportional band relative

to the heating proportional band. Particularly necessary if the rate of

heating and rate of cooling are very different. (Heat/Cool only)

0.1 to 10.0

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 39 40

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Eurotherm 3116 PID Podręcznik Użytkownika Strona 27