Siemens SIMATIC Manual page 62

Getting Started
Controller Tuning with the Parameter Assignment User Interface
Step Activity
1 Open the parameter assignment tool by
double-clicking on the instance DB
DB_TCONT_CP in the SIMATIC Manager.
2 Under Options, select the menu command
Controller Tuning.
3 On the curve recorder, check that the
manipulated variable and process value have
practically settled and click on Next.
4 Set "PID parameters" and click on Next.
5 Set "Tune by approaching the operating point
with a setpoint step change" and click on
Next.
6 Set the operating point to 70 and the
manipulated variable difference to 80 and
click on Next.
7 When the completion of the controller tuning
is displayed, click on Close.
You can now test these controller parameters by applying a setpoint step change
or a disturbance load to the process.
Applying a Setpoint Step Change
Step Activity
1 Open the curve recorder in the Options menu. The curve recorder window opens.
2 Open the Commissioning dialog in the
Options menu.
3 Enter a setpoint step change to 90 for the
setpoint parameter and click the Send button.
4 Observe the settling response of the process
value and manipulated variable.
Applying a Disturbance Load to the Process
Step Activity
1 Open the VAT_LoopControl variable table in
the SIMATIC Manager.
2 Enter a process disturbance of 30 at the
"DB_PROC_P".DISV parameter.
3 Observe the settling response of the process
value and manipulated variable.
5-2
Result:
The parameter assignment tool opens.
The curve recorder and the first dialog of the
wizard open.
The "Selecting the Controller Type" dialog
opens.
The "Selecting the Type of Process
Excitation" dialog opens.
The "Process Excitation" dialog opens.
The "Status and Result of the Tuning" dialog
opens.
The wizard and curve recorder are closed.
Result:
The Commissioning dialog opens.
The setpoint changes abruptly in the curve
recorder.
Result:
Variable table is opened.
The curve of the process value changes in the
curve recorder.
PID Temperature Control
A5E00125039-02