Celduc Temperature controller ECOM Manuel d'utilisateur télécharger pdf (Page 47)

48 ECOM0010 - User manual

6.2 Manual tuning

Set 2 in parameter 5 (

7XQH

word 2005).

The manual procedure allows the user a greater exibility on

deciding when to update PID algorithm parameters.

This procedure is activated writing 1 in the word modbus

1004.

The reference threshold to calculate the new PID parameters

is given by the result of the following operation:

Tuning threshold = Setpoint (word 1001) – Par.6

VGWX

(word 2006)

Ex.: if setpoint is 100.0°C and Par.6

VGWX

is 20.0°C, the

threshold to calculate PID parameters is (100.0–20.0) = 80.0°C.

N.B.: for greater accuracy in the calculation of PID parameters

it is recommended to launch the manual tuning when the

process is far from setpoint.

6.3 Synchronised tuning

4FUJOQBSBNFUFS

7XQH

word 2005).

This procedure has been designed to calculate correct PID

values on multi-zone systems, where each temperature

is inuenced by the next zones. Writing in word 1004, the

device works as follows:

Word 1004 value Action

 Tune o.

 Control output OFF

 Control output ON

 Tuning active

 Tuning completed: control output OFF

The operation of this Tuning mode is the following: the

master switches o or turns on all controllers (value 1 or 2 on

word 1004) for a time which is long enough to create inertia

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 102 103

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Celduc Temperature controller ECOM Manuel d'utilisateur Page 47