The "PID Self-Tuner" software package expands existing PID controllers into self-tuning PI or PID controllers. Easy to understand functions and systematically structured examples facilitate the adaptation of the controller to the process during operation.

PID Self-Tuner is suitable for the optimization of:

• Temperature controls.
• Liquid level controls.
• Flow control systems.

PID Self-Tuner has previously been used successfully in the following applications for the temperature control and self-optimization of

• hot plates, e.g. for warming foil or pressing pizza dough,
• tunnel and conveyor furnaces,
• solder baths, e.g. in PCB manufacture and
• water baths.

PID Self-Tuner V5.1 is now also suitable for temperature control and optimization for

• processes with heating and active cooling, in which the cooling must be identified,
• plastic extrusion and
• injection molding.

In addition, the function of a control zone was added in the PID Self-Tuner V5.1 which makes particularly fast heating or cooling possible. Outside the control zone, maximum heating or cooling is performed. The control zone function can be deactivated.

PID Self-Tuner works most efficiently for processes with:

• a stable asymptotic transient response.
• delay times that are not too long (delay time <0.1 x build-up time)
• sufficient linearity in the selected operating range
• sufficient quality of measurement signals
• Processes that are not intensified too much

PID Self-Tuner can be flexibly combined with

• PID Control (integrated in STEP 7),
• Standard PID Control,
• Modular PID Control,
• FM 355,
• FM 455,
• as well as any PID algorithm

in the systems

• SIMATIC S7-300 (CPU 313 or higher),
• SIMATIC S7-400 and
• WinAC.