Siemens SIMATIC S7 System Manual page 593

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Loop monitoring

After you have completed the auto-tune sequence and have transferred the suggested

tuning parameters to the CPU, you can use the control panel to monitor your loop's response

to a step change in the setpoint.

In the figure below, the loop responds to a setpoint change with the original tuning

parameters (before running auto-tune). Notice the overshoot and the long, damped ringing

behavior of the process using the original tuning parameters.

The loop responds to the same setpoint change after applying the values determined by the

auto-tune process using the selection for a fast response. Notice that for this process there is

no overshoot, but there is just a little bit of ringing.

S7-200 SMART

System Manual, V2.3, 07/2017, A5E03822230-AF

PID loops and tuning

11.7 PID Tune control panel

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Troubleshooting

Simatic s7-200 smart