7. Conclusion

A PLC is a good product if it's well chosen and well used. What may appear to be a truism has led us to draw attention to aspects sometimes considered trivial, such as I/O types, power supply sizing, program execution modes, and the limits of various types of communication, since these are points where mistakes are sometimes made that lead to additional installation costs or severely limit the performance obtained.

The choice of PLC depends on the environment. The more disturbed the environment, and the greater the requirements in terms of operating reliability, the more the PLC will stand out from competing solutions.

The next step is to find the right PLC for the job. There are PLCs with 8 I/Os, others with over 1,000... The multiplicity of models, configurations and business functions means that you can find the hardware that's right...