User manual

69
If heating or heating-cooling function and PID control form is selected for the
system;
If set value is greater than process value, process output becomes active till to the
value. When process value reaches to this
value, process output reduces to
Temperature+[(Set - Temperature) / 2]
0% and it calculates the PID coefficients.
Self Tune ( Step Response Tuning) :
Self Tune
Self Tune ( Step Response Tuning )
When power is on, while process value starts to change for being equal to process
set value, PID parameters are determined by the device with method.
For starting operation firstly power the device
off and then on. Also difference between process value and set value must be too
much.
Example 2 : Determination of PID parameters with Self Tunemethod
! Enter operator or technician menu
Select tune selection parameter in “run List” menu or
and turn to operation screen.
Power off the device.
Wait system to be in first conditions.
(For example : Decreasing of the temperature to ambient temperature while
controlling the temperature)
Apply power to the device
!
!
!
!
For Self Tune ( Step Response Tuning ) operation
Self tune
Auto-Self Tune
Self Tune ( Step Response Tuning )
3-
4-
:
1 - Tune selection parameter in “run List” menu must be selected
or
2 - For operation, firstly power off and then
apply power to the device.
For being started Tune operation (Auto Tune or Self Tune) control form must be P,
PI, PD or PID.
If process set value is changed while Tune operation is being performed, Tune
operation is canceled
i
Process
Value
Time
100%
Process
Output
Stun
Start
Value
PID coefficients are determined
and system becomes stable.
Start Value + [ ( Set - Start Value) ]
2
Process Set
Value ( )
If cooling function and PID control form is selected for the system;
If set value is less than process value, process output becomes active till to the
value. When process value reaches to this
value, process output is reduced to 0% and it calculates PID coefficients.
Temperature - [( Set - Temperature) / 2]