Hi Kevingalvez12, Our team made a documentation of PI control simulation using Autotune function block. Unfortunately, it's not in English. From there, we've also successfully applied autotuning of PI control a few times in projects. However, we don't have comparison with other brand PLC, so I can't tell how great it is, but I can say it's useful. Let me share some key Autotuning parts of the simulation. Below is how the FBD looks like: The key here are the PARA input in both AUTOTUNE and PI_B blocks. In Autotune PARA, there are 3 variables: step_ampl, tmax, and perf. For step_ampl and tmax values in actual application, you can refer to below table (also can be found in the Help): In order to set this values, you will need to create a DDT variable with Type: Para_AUTOTUNE. In this example, the variable name is "para_autotune" Autotune PARA_C output is linked to PI_B PARA input. The variable is also a DDT: Para_PI_B. Or if you're using PIDFF block, the type is Para_PIDFF. The variable name in this example is "temp_parameters". Except Kp, Ti, (Td and Kd), other parameters must be manually set. Leave it blank for Kp, Ti, (Td and Kd). And here is the simulation result: note: Autotune was started few seconds after setpoint was set. Hope this helps. Cheers, Pradipta
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