Commissioning The Pid_Compact And Pid_3Step Controllers - Siemens SIMATIC S7-1200 System Manual

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Technology instructions

10.2 PID control

Commissioning the PID_Compact and PID_3Step controllers

Use the commissioning editor to configure the PID controller for autotuning at startup

and for autotuning during operation. To open the commissioning editor, click the icon

on either the instruction or the project navigator.

Table 10- 33 Sample commissioning screen (PID_3Step)

Measurement: To display the setpoint, the pro-

cess value (input value) and the output value in a re-

al-time trend, enter the sample time and click the

"Start" button.

Tuning mode: To tune the PID loop, select either

"Pre-tuning" or "Fine tuning" (manual) and click the

"Start" button. The PID controller runs through multi-

ple phases to calculate system response and update

times. The appropriate tuning parameters are calcu-

lated from these values.

After the completion of the tuning process, you can

store the new parameters by clicking the "Upload PID

parameters" button in the "PID Parameters" section of

the commissioning editor.

If an error occurs during tuning, the output value of the

PID goes to 0. The PID mode then is set to "inactive"

mode. The status indicates the error.

System Manual, V4.2, 09/2016, A5E02486680-AK

S7-1200 Programmable controller