Impact analysis of encoder on the control and autotune of a pid controller using a Siemens S71500 PLC
DOI:
https://doi.org/10.14488/1676-1901.v25i1.5332Keywords:
Industrial automation, Encoder, PID, Conveyor, TunningAbstract
This research has analyzed and compared the difference in the results of PID (Proportional Integral Derivative) control autotuning based on different setpoints. The programmable logic controller (PLC) used was the SIMATIC S7-1500 model, and the settling time of the system was compared at different speeds. The evaluation utilized the TIA Portal programming tool, assessing module access, connections, configuration, and PID controller optimization. The objective was to study the industrial process of a conveyor belt to manage movements, acceleration, and speed reduction. Thus, PID control could optimize part transportation. For development and testing, a didactic kit with a stepper motor-driven conveyor belt was employed, where speed was monitored using a 600 pulses per revolution (PPR) incremental encoder. Tuning tests were conducted for 25%, 50%, 75%, 90%, and 100% setpoints. Except for the last test, automatic tuning was possible in all cases, with the system exhibiting an overshoot of less than 5%. It was observed that the system, despite its didactic nature, met expectations and allowed for the use of automatic tuning.
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