Answer: A, B, C.
Answer: The basic functions of fieldbuses include economical, safe and reliable transmission of information, correct use of transmitted information, and timely processing of transmitted information.
Fieldbus is a communication protocol used in the field of industrial automation, and its basic functions are as follows:
1. Economical, safe and reliable transmission of information: Fieldbus can economically, safely and reliably transmit all kinds of information required in industrial control systems, including data interaction between sensors, controllers, actuators, etc.
2. Correct use of transmitted information: Fieldbus can correctly analyze and use the transmitted information according to the needs of the system to ensure the correctness and reliability of the information.
3. Timely processing of transmitted information: Fieldbus can process the transmitted information in real time, respond to the status and requests of field devices in time, and ensure the real-time and responsiveness of the system.
Fieldbuses do not involve the function of storing large amounts of information for archiving, as this information is typically stored and managed by upper-level systems or data centers.
Therefore, depending on the meaning, the answer is A, B, C.