Can SIEMENS PLC replace R485 twisted pair cable with DP communication cable?
The point here is that neither DP nor RS485 is a physical transmission medium, not an agreement. Just like two people make a phone call, the telephone line is only the medium of transmission, and as for two people in Chinese or in English, that's the agreement. As a result, both physical media can be generic, and protocols are different.
Absolutely.DP itself is a special type of RS485, DP and cable transmission technology is RS-485 UTP from 9.6K bit/s to 12M bit/s baud rate. Therefore, it can be used completely.
