Modbus ethernet
Sign in to savethumb|Logo of Modbus-IDA, the older name of the industry consortium
Key facts
- Technology standard.title
- Modbus
- Technology standard.image
- Logo of Modbus.svg
- Technology standard.status
- Active
- Technology standard.version
- Modbus application protocol specification V1.1b3
- Technology standard.version_date
- April 26, 2012
- Technology standard.domain
- Fieldbus
via Wikipedia infobox
Article
26 sectionsContents
- Protocol description
- PDU and ADU
- Modbus transaction and PDU
- Modbus data model
- Function code
- Public function codes
- Function code 01 (read coils) as an example of public function code
- User-defined function codes
- Reserved function codes
- Exception responses
- Modbus over Serial Line protocol
- Modbus RTU
- Modbus ASCII
- Modbus messaging on TCP/IP
- Modbus TCP
- Example of a Modbus TCP/IP ADU/Modbus TCP frame in hexadecimal
- Other Modbus protocol versions over TCP/IP
- Other Modbus protocol versions
- JBUS mapping
- Limitations
- See also
- References
- Works cited
- External links
- Official
- Other
thumb|Logo of Modbus-IDA, the older name of the industry consortium
Modbus, sometimes stylized as MODBUS, is a fieldbus, an industrial computer networking protocol. It was originally designed for use with programmable logic controllers (PLCs), but has become a de facto standard communication protocol for communication between industrial electronic devices in a wide range of buses and networks.