Modbus is a serial communications protocol published by Modicon in 1979 for use with its programmable logic controllers (PLCs). Simple and robust, it has since become a de facto standard communication protocol, and it is now amongst the most commonly available means of connecting industrial electronic devices.
Modbus is a serial communications protocol published by Modicon in 1979 for use with its programmable logic controllers (PLCs). Simple and robust, it has since become a de facto standard communication protocol, and it is now amongst the most commonly available means of connecting industrial electronic devices.
Useful links
- ModBus organization, where main suppliers expose latest changes and improvements. See Technical docs for specs and implementation details.
- ModBus over serial line v1 as a quick reference.
- ModBus protocol, version published in 2000.
- Tutorial for beginners
