Siemens PCS7 PID Tuner Controller Optimization Steps - Solutions - Huaqiang

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Starting with Siemens PCS7V5.1, the controller "PCS7PIDTuner" can be used to optimize the controller. This tool can identify the control object parameters by measurement and give suggestions for setting the optimization parameters. These parameters can be used immediately if the user wants it.

Starting with PCS7V7.1, controllers in "PCS7Library" and "PCS7AdvancedProcessLibrary" can be optimized, as well as controllers with similar functions. It is also possible to adjust the motor start time of the step controller.

Claim:

The PID Tuner software of Siemens PCS7 is installed on the engineering station. This tool can be installed in the normal PCS7 engineering station installation.

Install the appropriate license. Starting with PCS7V7.1, no additional PCS7PID Tuner authorization is required.

The CFC has been compiled and downloaded to the plc.

There is an online connection between the ES and the PLC.

For the control loop, you need to know the following aspects:

1. Control the process characteristics of the object (whether there is an integral link)

2. Control loop status (manual or automatic)

3. Step operation point of the controller

4. Controller type (proportional integral differential, proportional integral or proportional controller)

Description:

The following uses a continuous proportional integral controller as an example to explain how to use the PCS7 PID Tuner.

note:

1. Please note that the optimization process will interfere with the actual system operation. If the actual process operation is affected, there will be a prompt in the corresponding optimization step. Users need to be aware of the possible consequences.

2. Make appropriate staffing arrangements for the operator before optimizing the work.

3. During the optimization process, pay close attention to the process curve record.

Sequence step

1 Prepare for controller optimization

Before optimization, the controller needs to switch to "optimized" mode. It can be set in the CFC or on the host OS panel.

Set the "OPTI_EN" pin to "Enable" in the CFC. This pin is hidden by default. If you are on the OS panel, check the "EnableOptimiz" option in the "Parameter" view.

2 Start PCS7 PID Tuner

Select the controller function block and start the tool in the CFC via the menu "Edit>OptimizePIDController...".

3 set the curve record parameters

To make the current display realistic, stop the curve record and click on the "Settings..." button.

4 start controller optimization

Click the "StartControllerOptimization" button.

5Read the measured value (steps 1 to 5)

In steps 1 to 3, it is necessary to define the conditions for reading the measured values. The measured value is read in step 4 and the curve record is monitored. At this point you can cancel the process simulation.

1. Select process characteristics (whether there is an integral link)

2. Select the operating mode (manual / automatic), enter the starting point to achieve the step simulation

3. Enter the new set value to achieve step simulation

4. Read the measured value

5. Cancel the process simulation

6 controller behavior and results (steps 6 to 8)

Select controller behavior and type in steps 6 and 7. In step 8, the control loop is simulated using the optimized controller parameters. It can be tested with different step values ​​and controller parameters.

6. Set controller behavior (appropriate disturbance / appropriate master action)

7. Parameter results and select the controller type (proportional integral differential, proportional integral or proportional controller)

8. Simulate the control loop using optimized parameters

7Set the controller (step 9)

The final step is to decide whether to adopt old or new settings. Click the "Finish" button to end the parameter optimization.

9. Controller parameter selection (old / new)

8Close the PID Tuner

The controller has adopted the new parameter settings. Close the PID Tuner with the "Endandsave" button. The controller is reset to the initial operational state.