User manual

68
Auto Tune (Limit Cycle Tuning) operation ;
Process control output runs according to heating if heating or heating-cooling
function and PID control form is selected,
Process control output runs according to cooling if cooling function and PID control
form is selected.
Canceling operation
Auto Tune is canceled. Then, without doing any changes in PID parameters and
Parameter, device continues to run with former PID parameters.
Auto Tune :
If sensor breaks ;
If operation can not be completed in 8 hours
If user adjusts parameter or
If user adjusts parameter
If process set value is changed while Tune operation is being performed
While Tune operation is being performed, if operation type selection is changed
as “Manual” when it is “Automatic” (If operation type selection is changed as
“Automatic” when it is “Manual”, then Tune operation is started again)
If output function is changed while Tune operation is being performed
(Heat Cool, Cool Heat)
While Tune operation is being performed, if control form is changed as “ON/OFF”
when it is “PID” (If control form is changed as “PID” when it is “ON/OFF”, the Tune
operation is started again)
1-
2- Auto Tune
3-
4-
5-
6-
7-
8-
ÞÞ
Example -1 : Starting Auto Tune operation by the user ;
Auto Tune
Auto-Self Tune
!
!
!
Enter operator or technician menu.
Adjust tune selection parameter in ”run List” menu ,
Or
Adjust automatic tune selection parameter in ”run List” menu
And return to main operation screen.
Process
Value
Time
While Atun
operation
100%
Process
Output
Control is unstable
PID coefficients were determined
Process Set
Value ( )
If Auto Tune operation finishes without any problem, device saves the PID
coefficients to memory and continue to run. Parameter is adjusted
automatically.
ForAuto Tune ( Limit Cycle Tuning ) operation
1- Auto
tune Auto-Self tune
2-
3-
:
Tune selection parameter in “run List” menu must be selected
or .
For being started Tune operation (Auto Tune or Self Tune) control form must be P,
PI, PD, PID.
If process set value is changed while Tune operation is being performed, Tune
operation is canceled
i