PROFINET and PROFIBUS are two fieldbuses from the PNO organization. The two are not comparable in themselves, PROFINET is based on Industrial Ethernet, and PROFIBUS is based on RS485 serial bus. The two protocols are completely different due to the different media, and there is no correlation. The similarities between the two are very real-time, because they all use a streamlined stack structure. Any development based on standard Ethernet can be directly applied to the PROFINET network. There are far more developers of Ethernet-based solutions in the world than PROFIBUS developers, so there are more resources available to innovate.
Performance comparison between PROFINET and PROFIBUSFor PROFIBUS, the bandwidth of data transmission is up to 12Mbps.
For PROFINET, the bandwidth for data transmission is 100 Mbps.
For PROFIBUS, the data transmission method is half duplex.
For PROFINET, the data transmission method is full duplex.
For PROFIBUS, the consistency data is up to 32bytes.
For PROFINET, the maximum consistency data is 254 bytes.
For PROFIBUS, the maximum user data is 244 bytes.
For PROFINET, the maximum user data is 1400 bytes.
For PROFIBUS, the maximum bus length of 12Mbps is 100m.
For PROFINET, the bus length between devices is 100m.
For PROFIBUS, the leading axis must be operated in the DP master.
For PROFINET, the leading axis can be run in any SIMOTION.
For PROFIBUS, special interface templates are required for configuration and diagnostics, such as the CP5512.
For PROFINET, a standard Ethernet network card can be used.
For PROFIBUS, if a PG is connected, it may cause communication problems.
For PROFINET RT, a PG access may have minimal response, while for PROFINET IRT, access does not cause any problems.
For PROFIBUS, special tools are required for network diagnostics.
For PROFINET, use IT-related tools.
For PROFIBUS, there is usually only one primary station on the bus. Multi-master systems can cause the DP cycle to be too long.
For PROFINET, any number of controllers can be operated in the network. Multiple controllers do not affect the response time of the IO.
For PROFIBUS, the main fault on the bus comes from a bus termination resistor mismatch or poor grounding.
For PROFINET, no bus terminating resistor is required.
For PROFIBUS, copper and fiber are used as communication media.
For PROFINET, wireless (WLAN) can be used for additional media.
For PROFIBUS, an interface can only be used as a master or slave. Ã For PROFINET, all data types can be used in parallel.
For PROFINET, an interface can act as both a controller and an IO device.
For PROFIBUS, the network location of the device cannot be determined.
For PROFINET, the topology information can be used to determine the network location of the device.
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