Content of communication signals between the instrument PLC and the frequency converter

Thread Content

The processing site is equipped with a pelletizing machine that includes a cutting blade and two rollers; there is a interlocking relationship between the speed of the cutting blade and the speed of the rollers, as well as an interlocking relationship between the temperature at the site and the speed of the cutting blade. The instrument signals go to the instrument PLC, and there are frequency converters for the electrical system. The connection between the instruments and the electrical system is achieved through communication, rather than through hard wiring. My question is: regarding the communication between the PLC and the frequency converter, it is the signals such as temperature and pressure from the instruments that are transmitted; then, within the frequency converter, there are configurations or calculations carried out to adjust the frequency signal ； Are it still the signals related to communication, such as frequency regulation, frequency conversion faults, and frequency conversion status? Are there anyone who is familiar with frequency converters? Do you know if there are any algorithms inside them?